Dictionary.net

the human nose (especially when it is large)

A hollow organ or tube attached to the head, or connected with the mouth, of various animals, and generally used in taking food or drink; a snout; a trunk.

By extension, applied to various tubelike mouth organs of the lower animals that can be everted or protruded.

The trunk of an elephant; the snout, nose, or tube, of certain animals and insects.

The trunk of some animals, as the elephant, for conveying food to the mouth.

Trunk, as of an elephant, &c.

The trunk, as of an elephant, to take and convey food to the mouth, or the snout of an insect, to suck blood or juice.

The snout or trunk of an elephant; the long snout of other animals, particularly insects.

A trunk-like process of the head, as of Insects, Annelids, Nemerteans, Elephants.

n. [Latin, Greek] An extensible hollow tube projecting from the head of the elephant and other animals, and capable of absorbing fluids; a snout; a trunk. The proboscis of insects is usually a horny tube formed by the modified jaws.