Dictionary entry

Discolith

Webster's Dictionary 1913

Dis″co‐lith (?), n. [Gr. � a round plate + -lith.] (Biol.) One of a species of coccoliths, having an oval discoidal body, with a thick strongly refracting rim, and a thinner central portion. One of them measures about ⅟₅₀₀₀₀ of an inch in its longest diameter.