Source : Webster's Revised Unabridged Dictionary (1913)

Inclusa \In*clu"sa\, n. pl. [NL., fr. L. inclusus, p. p. of
   includere to shut in.] (Zo["o]l.)
   A tribe of bivalve mollusks, characterized by the closed
   state of the mantle which envelops the body. The ship borer
   ({Teredo navalis}) is an example.