Source : 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 \Ex*sert"\, Exserted \Ex*sert"ed\, a. [L. exsertus, p. p.
   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.