chelicerae

This term is a specialized biological descriptor used primarily in zoology and entomology. It refers specifically to the mouthparts of chelicerates, distinguishing them from the mandibles found in insects or crustaceans. The term carries a clinical, scientific tone and is rarely used outside of academic or technical descriptions of arthropod anatomy.

Grammatically, this word is the plural form of the Latin chelicera. In scientific writing, it is almost exclusively used in the plural because these appendages occur in pairs. While the singular form exists, it is far less common in general biological discourse than the plural.