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单词 cercus
释义

Definition of cercus in English:

cercus

nounPlural cerci ˈsəːkəsˈsərkəs
Zoology
  • Either of a pair of small appendages at the end of the abdomen of some insects and other arthropods.

    〔动〕(某些昆虫和其他节肢动物的)尾须,尾铗,尾毛

    Example sentencesExamples
    • In L. forcipatus females the ovipositor valves reach the tips of the cerci; in L. disjunctus they do not.
    • They have no eyes, antennae, or caudal cerci but have a telson tail, which is common in crustaceans but absent in other hexapods.
    • By analogy with modern arthropods this zone was inferred to lie at the anterior of a terminal ventral body segment-the telosoma and the antenniform cerci of Olenoides serratus might be interpreted as belonging to that segment.
    • These species are notable for the plesiomorphic retention of venation (albeit already quite reduced) in their tegmina, segmented cerci, and pentamerous tarsi.
    • The cerci (tail appendages) begin to disarticulate.

Origin

Early 19th century: from modern Latin, from Greek kerkos 'tail'.

Definition of cercus in US English:

cercus

nounˈsərkəs
Zoology
  • A small appendage at the end of the abdomen of some insects and other arthropods, occurring in pairs.

    〔动〕(某些昆虫和其他节肢动物的)尾须,尾铗,尾毛

    Example sentencesExamples
    • The cerci (tail appendages) begin to disarticulate.
    • They have no eyes, antennae, or caudal cerci but have a telson tail, which is common in crustaceans but absent in other hexapods.
    • In L. forcipatus females the ovipositor valves reach the tips of the cerci; in L. disjunctus they do not.
    • These species are notable for the plesiomorphic retention of venation (albeit already quite reduced) in their tegmina, segmented cerci, and pentamerous tarsi.
    • By analogy with modern arthropods this zone was inferred to lie at the anterior of a terminal ventral body segment-the telosoma and the antenniform cerci of Olenoides serratus might be interpreted as belonging to that segment.

Origin

Early 19th century: from modern Latin, from Greek kerkos ‘tail’.

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更新时间:2025/7/1 19:08:37