protrudable en · ADJ
Etymology
From protrude + -able.
Meanings
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(not-comparable) That may protrude or be protruded.
The males, and rarely the females, of many kinds of bats have glands and protrudable sacks situated in various parts; and it is believed that these are odoriferous.
1874, Charles Darwin, “Secondary Sexual Characters of Mammals—continued”, in The Descent of Man, and Selection in Relation to Sex. […], 2nd edition, London: John Murray, […], →OCLC, Part II (Sexual Selection), page 529: