INDUSIAL
indusial
(adjective) of or relating to or being an indusium
Source: WordNet® 3.1
Etymology
Adjective
indusial (not comparable)
Of, pertaining to, or containing the petrified cases of the larvae of certain insects.
indusial limestone
Source: Wiktionary
In*du"sial, a. Etym: [See Indusium.]
Definition: Of, pertaining to, or containing, the petrified cases of the
larvæ of certain insects. 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.
Source: Webster’s Unabridged Dictionary 1913 Edition