a. [mod. f. L. annul-us (see ANNULUS) + -OID.] Ring-like. In Zool. applied by Prof. Huxley to animals in which the division of the body into ring-like segments is less distinct than in the Annulosa: see next.
1855. H. Spencer, Psych., I. I. i. 6. The sluggish annuloid types … contrasted with the energetic kinds of Annulosa.
1877. Huxley, Anat. Inv. Anim., xii. 678. The Annuloid Series, is represented by the Trichoscolices and the Annelida.
