Rissoid - definition of Rissoid by The Free Dictionary
|n.||1.||(Zool.) Any one of very numerous species of small spiral gastropods of the genus Rissoa, or family Rissoidæ, found both in fresh and salt water.|
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive
Two of the Truncatella species have an accessory sperm storage organ [ILLUSTRATION FOR FIGURE 5C-D OMITTED]; it resembles the upper oviduct gland in rissoids
, which in some taxa has sperm-storing lobes (Ponder 1985a).