Etymology
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proboscis (n.)

c. 1600, "elephant's trunk," from Latin proboscis (Pliny), from Greek proboskis "elephant's trunk," etymologically "means for taking food," from pro "forward" (see pro-) + boskein "to nourish, feed," from boskesthai "graze, be fed," from stem *bot- (source of botane "grass, fodder;" see botanic). Also extended to the long, flexible snouts of tapirs, insect parts, etc.

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Definitions of proboscis

proboscis (n.)
the human nose (especially when it is large);
proboscis (n.)
a long flexible snout as of an elephant;
Synonyms: trunk
From wordnet.princeton.edu