Webster’s Revised Unabridged Dictionary · 1913 Exsert Ex·sert′, v. t. [imp. & p. p. Exserted; p. pr. & vb. n. Exserting.] [See Exsert, a., Exert.] To thrust out; to protrude; as, some worms are said to exsert the proboscis. ‹ Exsert Exsertile ›