Webster's Revised Unabridged Dictionary · 1913

Exsert

Exsert , adjective

[Latin exsertus, past participle of exserere to stretch out or forth. See Exert.]

Standing out; projecting beyond some other part; as, exsert stamens.
A small portion of the basal edge of the shell exserted. — D. H. Barnes

Also: Exserted

Exsert , transitive verb

[See Exsert, a., Exert.]

To thrust out; to protrude; as, some worms are said to exsert the proboscis.