Definition of sessile in English:

sessile

Pronunciation: /ˈsesəl//ˈseˌsīl/

adjective

Biology
  • 1(of an organism, e.g., a barnacle) fixed in one place; immobile.

    • ‘Epizoic barnacles are sessile, marine crustaceans and constitute a model system featuring the above conditions.’
    • ‘Most radially symmetric animals are sessile, however, echinoderms are able to move.’
    • ‘It is also suggested that the reef may be a source of pelagic larvae of sessile organisms that may settle on mangrove roots for greater diversity.’
    • ‘Because anemones are sessile animals, staying put most of their lives, it is important for them to maintain dominance over their territory in competition for food and space.’
    • ‘Alternatively, competent larvae of many sessile invertebrate species do not progress toward metamorphosis if stimulatory cues are absent.’
    1. 1.1 (of a plant or animal structure) attached directly by its base without a stalk or peduncle.
      ‘sporangia may be stalked or sessile’
      • ‘It frequently occurs in the lower uterine segment and may be either sessile or pedunculated.’
      • ‘The tumors were described as pedunculated or sessile polypoid nodules or as cauliflower-like masses projecting into the lumen of the gallbladder.’
      • ‘These two phenomena are especially critical for sessile higher plants.’
      • ‘The genus is about equally divided into two subgenera, those with pedicellate flowers (Trillium L.) and those with sessile flowers (Phyllantherum Raf.).’
      • ‘It continues to grow with a dome shape, but it can be sessile or pedunculated.’

Origin

Early 18th century: from Latin sessilis, from sess- seated from the verb sedere.

Pronunciation:

sessile

/ˈsesəl//ˈseˌsīl/