proprietary name for a type of cracker, 1906, curiously from tri- + biscuit.
Entries linking to triscuit
tri-
word-forming element meaning "three, having three, once every three," from Latin tres (neuter tria) or Greek treis, trias "three" (see three).
biscuit n.
"kind of hard, dry bread baked in thin flat cakes," respelled early 19c. from bisket (16c.), ultimately (besquite, early 14c.) from Old French bescuit "biscuit" (12c.), altered under influence of cognate Old Italian biscotto, both from Medieval Latin biscoctum, literally "twice-baked," from Latin (panis) bis coctus "(bread) twice-baked;" see bis- + cook (v.). The U.S. sense of "small, round soft bun" is recorded from 1818.