— incombustibility, incombustibleness , n. — incombustibly , adv.
/in'keuhm bus"teuh beuhl/ , adj.
1. not combustible; incapable of being burned; fireproof.
n.
2. an incombustible substance.
[ 1425-75; late ME incombustibilis. See IN- 3 , COMBUSTIBLE ]