Ris″soid (?), n. [NL. Rissoa, the typical genus (fr. A. Risso, an Italian naturalist) + -oid.] (Zoöl.) Any one of very numerous species of small spiral gastropods of the genus Rissoa, or family Rissoidæ, found both in fresh and salt water.
Content
Rights and sources
Review source, license and attribution information for this content.
Content
Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.