clepsine

Century Dictionary and Cyclopedia

1. n. A genus of the order Hirudinea, including some of the lower forms of leeches, in which the sinus and other vessels form a continuous system of cavities containing blood, and in which the segmental organs open into the sinuses by ciliated apertures. It is the typical genus of the family Clepsinidæ. C. bioculata is an example.

GNU Webster's 1913

1. n. (Zoöl.) A genus of fresh-water leeches, furnished with a proboscis. They feed upon mollusks and worms.