Suctoria \Suc*to"ri*a\, n. pl. [NL. See {Suction}.] (Zool.) 1. An order of Infusoria having the body armed with somewhat stiff, tubular processes which they use as suckers in obtaining their food. They are usually stalked. [1913 Webster] 2. Same as {Rhizocephala}. [1913 Webster]