ebony

(noun) a very dark black. Synonyms: coal black, jet black, pitch black, sable, soot black.

(noun) hard dark-colored heartwood of the ebony tree; used in cabinetwork and for piano keys.

(noun) tropical tree of southern Asia having hard dark-colored heartwood used in cabinetwork. Synonyms: ebony tree, Diospyros ebenum.

(adj) of a very dark black. Synonyms: ebon.