1550s, from L. cubus, from Gk. kybos "a cube, a die, vertebra," from PIE base *keu(b)- "to bend, turn." The verb is 1580s in the mathematical sense; 1947 with meaning "cut in cubes."
cube (kyb) Pronunciation Key
Verb
To multiply a number or a quantity by itself three times; raise to the third power. For example, five cubed is 5 × 5 × 5.
Noun
The product that results when a number or quantity is cubed. For example, the cube of 5 is 125.