EVAGINATE Meaning of EVAGINATE in English add. ·vi & ·vt to become evaginate; to cause to be evaginate. 2. evaginate ·add. ·adj protruded, or grown out, as an evagination; turned inside out; unsheathed; evaginated; as, an evaginate membrane. Webster English vocab. Английский словарь Webster. 2012