noun
Usage: usually capitalized 1st O
1.
a. also osage apple : an ornamental American tree ( Maclura pomifera ) of the family Moraceae having dark green glossy leaves, milky sap, hard bright orange-colored wood that yields a dye, and imperfect flowers
b. : the wood of the osage orange
c. : the yellowish green tubercled globular fruit of the osage orange tree consisting of the united fleshy calyxes of the pistillate flowers
2. usually capitalized 1st O & often capitalized 2d O : the yellow coloring matter that is extracted from the wood of the osage orange tree and is similar to old fustic — see dye table I (under Natural Yellow 8 )