Indusial limestone

(Geol.) a fresh-water limestone, largely composed of the agglomerated cases of caddice worms, or larvæ of caddice flies (Phryganea). It is found in Miocene strata of Auvergne, France, and some other localities.

See also: Indusial

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.