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词汇 sessile
释义

Definition of sessile in English:

sessile

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

    〔生〕(生物体,如藤壶)固着的;固定的

    parrotfish inadvertently graze upon sessile invertebrates when cropping algae
    overall body shape is consistent with a sessile habit
    Example sentencesExamples
    • Epizoic barnacles are sessile, marine crustaceans and constitute a model system featuring the above conditions.
    • Alternatively, competent larvae of many sessile invertebrate species do not progress toward metamorphosis if stimulatory cues are absent.
    • 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.
    1. 1.1Zoology Botany (of a plant or animal structure) attached directly by its base without a stalk or peduncle.
      〔植,动〕(植物或动物结构)无柄的
      sporangia may be stalked or sessile

      芽孢囊可能有柄,也可能无柄。

      Example sentencesExamples
      • It frequently occurs in the lower uterine segment and may be either sessile or pedunculated.
      • The genus is about equally divided into two subgenera, those with pedicellate flowers (Trillium L.) and those with sessile flowers (Phyllantherum Raf.).
      • The tumors were described as pedunculated or sessile polypoid nodules or as cauliflower-like masses projecting into the lumen of the gallbladder.
      • It continues to grow with a dome shape, but it can be sessile or pedunculated.
      • These two phenomena are especially critical for sessile higher plants.

Origin

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

Definition of sessile in US English:

sessile

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

    〔生〕(生物体,如藤壶)固着的;固定的

    Example sentencesExamples
    • 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.
    • Epizoic barnacles are sessile, marine crustaceans and constitute a model system featuring the above conditions.
    • 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. 1.1Botany Zoology (of a plant or animal structure) attached directly by its base without a stalk or peduncle.
      〔植,动〕(植物或动物结构)无柄的
      sporangia may be stalked or sessile

      芽孢囊可能有柄,也可能无柄。

      Example sentencesExamples
      • These two phenomena are especially critical for sessile higher plants.
      • The tumors were described as pedunculated or sessile polypoid nodules or as cauliflower-like masses projecting into the lumen of the gallbladder.
      • It frequently occurs in the lower uterine segment and may be either sessile or pedunculated.
      • It continues to grow with a dome shape, but it can be sessile or pedunculated.
      • The genus is about equally divided into two subgenera, those with pedicellate flowers (Trillium L.) and those with sessile flowers (Phyllantherum Raf.).

Origin

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

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