orbicula
/AO1 R B IH0 K Y AH0 L AH0/noun
- 1
A dorsal sclerite over a hymenopteran arolium; a hard exoskeletal feature with species-specific shape that overhangs and protects the adhesive tip of such an insect's leg and around which the claw(s) curl. Abbreviation "or" or "rb".
- 2
(zoology, dated) A discina (brachiopod).
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