Indusial \In*du"sial\, a. [See {Indusium}.]
Of, pertaining to, or containing, the petrified cases of the
larv[ae] of certain insects.
[1913 Webster]
{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. Indusiate