Annulosa
An´nu`lo´sa
n. pl. 1. (Zool.) A division of the Invertebrata, nearly equivalent to the Articulata. It includes the Arthoropoda and Anarthropoda. By some Zoologists it is applied to the former only.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.