Definition of cercus in English:
noun (plural cerciˈsərˌsī-ˌkī)Zoology
A small appendage at the end of the abdomen of some insects and other arthropods, occurring in pairs.
- 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.
Early 19th century: from modern Latin, from Greek kerkos 'tail'.
Definition of cercus in:
- British & World English dictionary
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