proboscis

Short definition from Wiktionary

Noun

1. 1
   An elongated tube from the head or connected to the mouth, of an animal.
2. 2
   An elongated tube from the head or connected to the mouth, of an animal: The tubular feeding and sucking organ of certain invertebrates like insects, worms and molluscs.
3. 3
   An elongated tube from the head or connected to the mouth, of an animal: The trunk of an elephant.
4. 4
   A large or lengthy human nose.