The Collaborative International Dictionary
Indusial
Indusial \In*du"sial\, a. [See Indusium.] Of, pertaining to, or containing, the petrified cases of the larv[ae] of certain insects.
Indusial limestone (Geol.), a fresh-water limestone, largely composed of the agglomerated cases of caddice worms, or larv[ae] of caddice flies ( Phryganea). It is found in Miocene strata of Auvergne, France, and some other localities.
Wiktionary
indusial
a. Of, pertaining to, or containing the petrify cases of the larvae of certain insects.
WordNet
indusial
adj. of or relating to or being an indusium