annuli

Plural of annulus. annulism (an'ū-lizm), n. [L. annulus, a ring (see annulus ), + -ism.] The quality of being annulated, annulose, or annelidan; ringed structure: specifically said in zoöl. of an annelid, annulate, or annulose animal. Here [among Sipunculide ] radiism sets and annulism appears. E. Forbes, Hist. Brit. Starfish (1841), p. 243. annullable (a-nul'a-bl), a. [ [ anullement, II. n. One of the Annuloida . Annuloida (an-ū-loi da), n. pl. [NL., nulus, more correctly anulus, a ring (see annu lus ), + -oida.] A name applied by Huxley (1869) to a subkingdom of animals, consisting of the Scolecid a and Echinoderm at a, an a ocia tion subsequently modified by the same author, Also called Echinozoa. [Disused.] Annulosa (an-u-lo'sä), n. pl. [NL., neut. pl. of annulosus: see annulose.] 1. In some systems of zoological cla ification, a term applied to invertebrate animals which exhibit annel ism or annulism: approximately synonymous with the Cuvierian Articulata, or the modern Vermes together with Arthropod a, but used with great and varying latitude of signification.-2. A name given by Huxley (1869) to a subkingdom of animals consisting of the Crustacea, Arachnid a, Myriapod a, Insect a, Cha tognatha, and Annelid a, or crustaceans, spiders, centipeds, true insects, true worms, and some other Vermes. Excepting the vermiform members of this group, it is conterminous with Arthropod a (which see), and is no longer used.