The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

         A small portion of the basal edge of the shell
         exserted.                                --D. H.
                                                  Barnes.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

exsert
    v 1: thrust or extend out; "He held out his hand"; "point a
         finger"; "extend a hand"; "the bee exserted its sting"
         [syn: exsert, stretch out, put out, extend, hold
         out, stretch forth]