Definition of sterile in English:

sterile

adjective

  • 1Not able to produce children or young.

    ‘the disease had made him sterile’
    • ‘As expected given low levels of wild codling moths, release of sterile males, and treatment with pheromone, there was no detectable codling moth damage in any orchard.’
    • ‘Because hybrid males are almost completely sterile, almost all eggs are unfertilized.’
    • ‘But because mules are sterile, breeding new champions is difficult.’
    • ‘Transition probabilities were nearly identical when sterile individuals were excluded from the analysis.’
    • ‘Ants are divided into castes, with reproductive queens and kings, and sterile workers (all of which are female).’
    • ‘Turning nectar into honey is one of many tasks performed by the worker bees - the sterile females.’
    • ‘The sterile females also had rough eyes and clipped wings, two phenotypes associated with cell division defects.’
    • ‘This means that when females cannot detect costly mates, the strength of selection on females increases with the frequency of sterile males in the population.’
    • ‘We don't think that would be a problem as sterile fish are not genetically manipulated.’
    • ‘If enough females mate with the sterile males, the overall population should be reduced, thereby reducing the danger of human infection.’
    • ‘The ratter kills young and old, male and female, pregnant and sterile with the same compassionless urge.’
    • ‘Sex, he had explained to her, takes up a lot of biological energy, and he couldn't figure out why a species would evolve such an orientation when there was no possibility of reproduction between sterile females.’
    • ‘In many social insects, kin selection has led to the evolution of sterile workers which are behaviorally or morphologically specialized for colony defense.’
    • ‘The barnacle replaces the crab's gonads with itself, thereby rendering its host sterile.’
    • ‘After 10 days, all females in vials lacking eggs were discarded and considered sterile.’
    • ‘As the experiment was designed to assess the effect of mating on female egg fertility, it was important to remove sterile females from the data set.’
    • ‘Worker insects in hives are often sterile clones of the reproductively-active queen.’
    • ‘Those adults that do survive are extremely sickly; the females were invariably sterile and the males bred very poorly.’
    • ‘Following a two-year pre-release sanitation programme in Zone 1, the first sterile moths were released in May 1994.’
    • ‘The scientists use the sterile lion as a ‘teaser’ to determine which females are ‘in season’ and ready to inseminate.’
    infertile
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    1. 1.1 (of a plant) not able to produce fruit or seeds.
      • ‘Fern experts in the group added two unusual Botrychiums, so the Skidmore fern list now stands at 30, not counting sterile hybrids.’
      • ‘Fruiting plants are immediately recognizable by the unique bright blue color of their drupes, but sterile shrubs are very nondescript and easily overlooked.’
      • ‘It is a genetic modification that makes the plants grown from the transgenic seed sterile.’
      • ‘A freeze at this stage can kill or damage the pollen-producing anthers, affecting kernel development and possibly causing the plant to become sterile.’
      • ‘In October, researchers said that they had a male sterile bentgrass plant.’
      • ‘But this presents some difficulties because banana is essentially a clonal crop with many sterile species.’
      • ‘Male sterile plants don't produce pollen, which makes it easier to breed improved hybrids and produce hybrid seed.’
      • ‘In severe cases the flowers are sterile, although lesser affected female flowers may be fertilized to give mantled fruit.’
      • ‘According to the magazine report, new varieties of bananas cannot be easily produced as the plant is a sterile mutant.’
      • ‘And if the transformation did not occur throughout the Pacific, it probably occurred in just one place, and the sterile trees must have been spread by human means.’
      • ‘On the contrary, the surgically-treated plants and the sterile mutants put more into their reproductive structures and live longer.’
      • ‘Lacecap hydrangeas bear flat round flowerheads with centers of fertile flowers surrounded by outer rings of sterile flowers.’
      • ‘He said cross-fertilisation could be stopped by making GM plants sterile.’
      • ‘That imbalance prevents seeds and pollen from developing normally, making the mutant plants sterile.’
      • ‘Vegetative propagation is used because, except for a few recently discovered fertile clones, garlic flowers are sterile and will not produce true seed.’
      • ‘Crossing experiments and field observations have shown that triploid individuals are sterile and no fruits are produced.’
      • ‘The corporations are also working to ensure GM crops are sterile, so farmers are forced to buy new seeds from them each year.’
      • ‘Other solutions include making the plants sterile or growing them in enclosed greenhouses.’
    2. 1.2 (of land or soil) too poor in quality to produce crops.
      • ‘Downy blue star (A. ciliata) is native to sterile sandy soils in the southern states.’
      • ‘The sturdy roots dug deep into unyielding rocks and drew nourishment from the seemingly sterile soil.’
      • ‘From here on my wicker chair it seems incredible that just short decades ago this garden was a dust-bowl, a sterile desert.’
      • ‘Unless your soil is actually sterile, which is rare, it is recommended that you use your soil as you find it.’
      • ‘It is a perennial forb that prefers dry, sterile, and sandy soils, often in dry, open woodlands, savannas, or clearings.’
      • ‘Hester remains in Boston, and goes to live on a remote peninsula of the town in an abandoned cottage where the land is too sterile to support a family.’
      • ‘If the king is impotent, the land likewise becomes sterile.’
      • ‘Scientists now suspect that the harsh atmosphere made the soil sterile.’
      unproductive, infertile, unfruitful, uncultivatable
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    3. 1.3 Lacking in imagination, creativity, or excitement; uninspiring or unproductive.
      ‘he found the fraternity's teachings sterile’
      • ‘We are also seeing a resurgence of sterile debate about process, rather than negotiations on substance.’
      • ‘The photographs are far from romantic evocations of the seaside and have a disengaged quality about them, lifeless without being sterile.’
      • ‘His tactics turned out to be sterile, dull and most importantly ineffective.’
      • ‘Personally, I have long ceased listening to either its presentation by the Finance Minister, or the sterile debate that follows.’
      • ‘No, their consultations are done in the cold sterile environment of the autopsy room.’
      • ‘Radio in this town is so sterile that young people are turned off by it.’
      • ‘It becomes sterile - lacking joy, awe and a sense of God.’
      • ‘This year, thankfully, sees a break with that sterile debate.’
      • ‘The problem is the debates on the Left have been quite sterile.’
      • ‘Heaven turned out to be a rather sterile experience of standing around on clouds.’
      • ‘Without dialogue and a lively sense of interdependence, both traditions will eventually die and become sterile.’
      • ‘They are technologically advanced but emotionally sterile, and their sole goal is universal domination.’
      • ‘Suddenly, all my lavishly packaged concept albums seemed pointless, irrelevant, sterile.’
      • ‘"The locomotive is my depression crashing in on my rather sterile, matter-of-fact world.’
      • ‘They will silence me, continuing onwards to their sterile and humorless future, wiping the world's mysteries into oblivion.’
      • ‘If that's the aim, it's a futile and sterile one.’
      • ‘The poetry resulting from direct computer entry is polished but rather sterile I think.’
      • ‘When our words lose the ability to convey an ethical connotation they become sterile and worthless.’
      • ‘Discussions are sometimes abusive and unpleasant, and often sterile and unproductive, with most people adhering rigidly to their long-entrenched prejudices.’
      • ‘Good people worked for him, many of them doing their first-ever jobs in comics, but the material was generally sterile and lifeless, and it sold accordingly.’
      pointless, profitless, unproductive, unfruitful, fruitless, unrewarding, abortive, unsuccessful, ineffectual, ineffective, worthless, useless, unprofitable, futile, vain, idle
      unimaginative, uninspired, uninspiring, unoriginal, derivative, stale, lifeless, musty
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  • 2Free from bacteria or other living microorganisms; totally clean.

    ‘a sterile needle and syringes’
    • ‘The authors conclude that tap water might be as effective in preventing bacterial infection as sterile normal saline solution for simple wounds in children.’
    • ‘The tip of the syringe should be kept sterile, and not placed in the infant's incubator or bed.’
    • ‘All invasive surgical procedures should be performed using aseptic technique and sterile instruments and supplies.’
    • ‘Wrap the burned area with a dry, sterile dressing or a clean cloth.’
    • ‘Before the procedure, the area is prepared with antiseptic solution and a sterile drape is placed over your body.’
    • ‘Finally, the seeds were washed with sterile water five or six times before placing them for germination on cotton pads.’
    • ‘Sterilizing seed and growing plants under sterile conditions was done as previously described.’
    • ‘When blisters appear, fluid should be withdrawn with a sterile syringe with needle, relieving pressure and subsequent trauma.’
    • ‘Broader access to sterile syringes, however, may be an uphill battle.’
    • ‘The holes were flushed with sterile saline to ensure they were clear of debris.’
    • ‘They also provide sterile syringes and needles, as well as management of overdoses by medical personnel when necessary.’
    • ‘The home grower is under less pressure and conditions are not normally as sterile.’
    • ‘Open fractures need to be cleaned thoroughly in the sterile environment of the operating room before they're set because the bone's exposure to the air poses a risk of infection.’
    • ‘The closure threatens the supply of clean, sterile needles to local intravenous drug users.’
    • ‘Use of correct procedures for transporting items preserves the qualities of the sterile and clean environment.’
    • ‘If you find that the foreign object is embedded in the eyeball, cover the person's eye with a sterile pad or a clean cloth.’
    • ‘Plants were rinsed with sterile deionized water.’
    • ‘Before application of the dressing, the skin around the pressure ulcer was cleaned with sterile saline.’
    • ‘Sterile syringes and needles should be given to confirmed drug addicts.’
    • ‘What is the recommended action if these instruments are not considered sterile?’
    aseptic, sterilized, germ-free, antiseptic, disinfected, uninfected, uncontaminated, unpolluted, pure, clean
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Origin

Late Middle English: from Old French, or from Latin sterilis; related to Greek steira ‘barren cow’. sterile (sense 2) dates from the late 19th century.

Pronunciation

sterile

/ˈstɛrəl//ˈsterəl/