An elongated, flexible appendage extending from the head or mouth area of various animals, used for feeding, breathing, or sensory functions. Examples include elephant trunks, butterfly feeding tubes, and mosquito mouthparts.
From Greek 'proboskis' meaning 'means for feeding,' from 'pro' (before) and 'boskein' (to feed). The term was first used in English in the 1600s to describe elephant trunks and later expanded to similar structures in other animals.
The proboscis represents one of evolution's most elegant solutions for extending reach and sensitivity, with elephant trunks containing over 40,000 muscles and being capable of picking up objects as small as a single blade of grass or as heavy as 700 pounds! Butterfly proboscises work like tiny straws that coil up when not in use, while some flies have proboscises that can extend longer than their entire body.
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