The Collaborative International Dictionary
Exserting
Exsert \Ex*sert"\, v. t. [imp. & p. p. Exserted; p. pr. & vb. n. Exserting.] [See Exsert,
, Exert.] To thrust out; to protrude; as, some worms are said to exsert the proboscis.
Wiktionary
exserting
vb. (present participle of exsert English)