Are you sure it's cornaptious?? That isn't a word IIRC.
Could it be one of the following:
(Someone might have already said this one..
Cornaceae- A tree family, for example, ythe cornel tree of the genus cornus?
Coriaceous-
1) Resembling leather, leathery
2) Made of leather ?
(Comes from Corium- 1) the true skin, under the epidermis or 2) leather armour.)
Cornemuse- A French bagpipe (strange I know
)
Cornigerous- Horned
Cornucopia- The horn of plenty, in one fable being the horn of the goat that suckled Jupiter, sometimes an ornament of a horn overflowing with fruits, but now it's often used to mean an abundant supply or stock.
Sorry, that's all I can think of right now.. maybe it's some old or american slang word I've never heard of.