protrusible

 
Pronunciation: /prəˈtruːsɪb(ə)l/
(also protrusile)

adjective

Zoology
  • (of a body part, such as the jaws of a fish) capable of being protruded or extended.

Origin:

mid 19th century: from Latin protrus- 'extended or thrust forward' (from the verb protrudere) + -ible