Source : Webster's Revised Unabridged Dictionary (1913)

Annuloida \An`nu*loid"a\, n. pl. [NL., fr. L. annulus ring +
   -oid.] (Zo["o]l.)
   A division of the Articulata, including the annelids and
   allied groups; sometimes made to include also the helminths
   and echinoderms. [Written also {Annuloidea}.]