Mid 19th century; earliest use found in Charles Darwin (1809–1882), naturalist, geologist, and originator of the theory of natural selection. From protrude + -able.
Definition of protrudable in US English:
protrudable
adjectiveprəˈtruːdəbl
rare
Capable of being protruded, protrusible.
Origin
Mid 19th century; earliest use found in Charles Darwin (1809–1882), naturalist, geologist, and originator of the theory of natural selection. From protrude + -able.