Defn: A genus of freshwater leeches, furnished with a proboscis. They feed upon mollusks and worms.

CLEPSYDRA
Clep"sy*dra, n. Etym: [L. from Gr.

Defn: A water clock; a contrivance for measuring time by the graduated flow of a liquid, as of water, through a small aperture. See Illust. in Appendix.

CLEPTOMANIA
Clep`to*ma"ni*a, n. Etym: [NL.]

Defn: See Kleptomania.

CLERESTORY
Clere"sto`ry, n.

Defn: Same as Clearstory.

CLERGEON
Cler"geon, n. Etym: [F., dim. of clerc. See Clerk.]

Defn: A chorister boy. [Obs.] Chaucer.

CLERGIAL
Cler"gi*al, a.