Definition of cross section in English:

cross section


  • 1A surface or shape exposed by making a straight cut through something, especially at right angles to an axis.

    ‘the cross section of an octahedron is a square’
    ‘in cross section the sailfish's body looks like a tapering spear’
    • ‘On average, females tend to have greater trouble with certain types of spatial perception - for example, visualizing the cross section of an arbitrary shape that has been rotated to a different facing.’
    • ‘As a blade bends, it changes shape: the cross section of an erect stem is circular, while one taken at the bending point is oval.’
    • ‘The installation was conceived as a cross section of a shape that was outside of the time and place of the gallery.’
    • ‘With the passage now comfortable walking size, almost square in cross section, I found a rock projecting from the wall that would be our final station.’
    • ‘You should now have the blank planed down to a cross section which is an octagon in shape with 8 equal sides.’
    • ‘A large convex molding, semicircular in cross section, located at the base of a classical column.’
    • ‘In cross section it is a symmetrical structure of three blades protruding from a central, solid shaft.’
    • ‘The shaft is roughly triangular in cross section.’
    • ‘The end sac is a polygonal chamber, about 150 m in cross section.’
    • ‘It possesses a long bill that is very stout and round in cross section.’
    • ‘Each arm is oval in cross section, averaging 6.2 x 8 mm in diameter.’
    • ‘Incisors and canines are absent, but the anterior cheek teeth are enlarged, triangular in cross section, and canine-like.’
    • ‘The shaft is slender and triangular in cross section at mid length.’
    • ‘Straight hairs are round in cross section, while wavy hairs are alternately oval and round; very curly and kinky hairs are shaped like twisted ribbons.’
    • ‘The body form is generally triangular in cross section.’
    • ‘In cross section, crystals have a compressed diamond-shaped outline.’
    • ‘When the straw is straight, the cross section is a perfect circle.’
    • ‘In the upper half of the shaft, there are sharp anterior and posterior ridges and a less significant lateral ridge, giving a triangular profile in cross section.’
    • ‘While most sedges possess triangular stems, its stem is round in cross section.’
    • ‘The width and the height of the fiber were measured and the cross-sectional area was calculated assuming the cross section is elliptical in shape.’
    1. 1.1A thin strip of tissue or other material removed by making two straight parallel cuts through it.
      • ‘The cross sections of the samples are analyzed, and the pigments are identified under a polarizing or scanning electron microscope.’
      • ‘This is a combination of the thin cross section and the poor clamp design.’
      • ‘Two trenches excavated across sets of ridges provided cross sections and a sample of material from ridge contexts.’
      • ‘Further, it has been described that the cross section of collagen fibrils contains central low density areas.’
      • ‘My old swimming goggles fit perfectly on the thin cross section of birch.’
      • ‘When you look at cross sections of muscle before and after a long bout of exercise, the glycogen is gone, but so are the lipids [fat].’
      • ‘Due to the rarity of pores in the longitudinal cross sections here examined, it was difficult to determine the relative thickness of the two types of sublayer.’
      • ‘I finally gave up on the cross sections when I found myself spending more time removing mud than sketching and just concentrated on keeping the data legible.’
      • ‘Culture involves a hanging sheet of acrylic of an approximate pine-tree shape, on which are mounted 26 petri dishes, most containing thin cross sections of rolled canvas.’
      • ‘The NYSNA distributed information about how to stop smoking along with samples of nicotine patches, and we had a display that included cross sections of lungs displaying healthy, emphysema, and actual lung tumor tissue.’
      • ‘After three daily changes of molten paraffin, tissues were embedded in paraffin to provide cross sections.’
      • ‘By examining the cross sections of bones microscopically, paleontologists can determine how much the bones grew each year, as well as the age of an animal at death.’
      • ‘Partial wood cross sections were removed from each tree with a chainsaw and the location of each sample was then determined and placed on the topographic map.’
      • ‘Columnar grains were observed on macroscopic examination of a transverse cross section cut from this region.’
      • ‘Columns of vascular tissue are visible here in a cross section of trunk.’
      • ‘It requires that a cross section of the animals' spinal column be removed.’
  • 2A typical or representative sample of a larger group.

    ‘a cross section of our senior managers’
    • ‘It is vitally important that the membership reflects the views of as wide a cross section of the diverse elements of the borough as possible.’
    • ‘A strategy group will then be established comprising representatives from a cross section of parties involved in rural tourism and clear objectives will be defined for the sector.’
    • ‘What I did do was test a good cross section of available ammo that is identified as match-grade.’
    • ‘Established over more than 40 years ago, our customer base covers a wide cross section of European and Export military, police and civil customers.’
    • ‘The British Household Panel Study is an annual survey of a representative cross section of British households.’
    • ‘This entailed a full day of dialogue with representative cross sections of the Canadian population.’
    • ‘He also selected diverse corporate media executives, hoping that the cross section of these media representatives would ensure that any self-interests would cancel one another out.’
    • ‘If the sample taken wasn't a cross section of the people who live in the borough then it isn't representative.’
    • ‘This new plan is the work of a wide cross section of clinical staff, patients and their representatives as well as health service managers.’
    • ‘Coming up with a glossary of terms would promote understanding, but limit the expression of vast cross sections of the demographic.’
    • ‘This is not a car simply for beefy blokes with big arms to twirl around correcting manic oversteer - it's a car that should appeal to a wide cross section of enthusiasts.’
    • ‘This is part of the Central Bank's attempt to diversify the users of the auditorium to ensure that as wide a cross section of the community gets to use the space.’
    • ‘Representatives from a wide cross section of the community will be getting round the table with airport chiefs for the third community and stakeholder conference.’
    • ‘We appeal to a wide cross section of the community.’
    • ‘However, training with just one or two people can put you in a rut, make sure you roll with as wide a cross section of the club as possible.’
    • ‘The centre is the ideal venue as it attracts a wide cross section of the local community who visit its library, cafe, doctor's surgery, gym and community groups which are all based at the centre.’
    • ‘The target regions were strategically selected to provide a representative cross section of the entire human genome sequence.’
    • ‘There was lively and diverse debate throughout the day among the wide cross section of groups that attended the conference.’
    • ‘These visits generate very positive publicity in a wide cross section of important tourist markets.’
    • ‘I became in charge of running the day and I could see that if I didn't get this day to appeal to a wider cross section, then it would fall into decline.’
    cross section, variety, sampling, test
    View synonyms
  • 3Physics
    A quantity having the dimensions of an area which expresses the probability of a given interaction between particles.

    • ‘Ultimatum is used in nuclear reactors as a reflector or moderator for it has a low thermal neutron absorption cross section.’
    • ‘Beyond the gas chamber was a detector, which allowed them to measure the cross section - the probability for benzene molecules to interact with gas atoms at each velocity.’
    • ‘True, we should not expect the biology teacher to teach the fluid dynamics of the circulatory system, or the chemistry teacher to teach the concept of cross sections when introducing nuclear chemistry.’
    • ‘The comments did, however, leave open the outside possibility that such an inordinate cross section might be due to some role of the atomic electrons in coupling the x-ray photons strongly to the nucleus.’


  • [with object] Make a cross section of.

    ‘complex triangular terrain models for contour cross-sectioning’
    • ‘The resultant glass boule is then cross-sectioned into a wafer several millimeters in diameter and a couple millimeters thick (approximately the same size as the multiplexer chip).’
    • ‘Performing with other musicians means that you are always comparing and cross-sectioning their ideas with your own.’
    • ‘Leaf explants were cross-sectioned at 200 m thickness and washed.’
    • ‘Paint pops were cross-sectioned and viewed under magnification.’
    • ‘Plot trajectories can be cross-sectioned, schematized and illustrated like maps or mazes, and a picture can be worth a thousand words.’
    • ‘When the lid housing is opened and closed, the evaporating portion of the second heat pipe is rotated within the coiled first heat pipe portion and slidably engages its circularly cross-sectioned interior side portion.’
    • ‘The table is covered with dismantled scaly things, things sliced and jellied, cross-sectioned things that squirmed the bottom of the sea.’
    • ‘If required, the sample was cross-sectioned with a cold sharp knife.’
    • ‘Many of the myoma cells in these sections were neither cross-sectioned nor longitudinally sectioned.’
    • ‘The exceptions are the fetuses, but only because they aren't cross-sectioned, just propped up in display cases.’
    • ‘Two observers matched cross-sectioned airway-artery pairs.’
    • ‘Another way to look at this might, of course, be to cross-section it the other way.’
    • ‘In particular, the latter and their major branches were cross-sectioned at 3-mm intervals, with no gross evidence of lesion or lumen reduction.’
    • ‘The renovated pump housing has been cross-sectioned to show the interior, encasing the foot of one of Victory's masts.’


cross section

/ˈkrɒs ˌsɛkʃ(ə)n/