Definition of protrusible in English:

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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.
Example sentences
  • Therefore, many fish with protrusible jaws have a second set of jaws in the throat, termed pharyngeal jaws, that process food and free the outer jaw to continue feeding.
  • These are trapped by the protrusible ciliated feeding tentacles, or lophophore.
  • As soon as the whiskers pass over food, the protrusible mouth drops down with an elevator-like motion and rapidly sucks in its meal.

Origin

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

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