An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

Geometry: The regular solid whose faces are six squares.
Algebra: The third power of a quantity; the product of three equal factors (a . a . a = a³).

From L. cubus, from Gk. kubos "a cube, a die; cavity before the hip," kubiton "elbow;" cf. Skt. kubra- "hole in the earth, pit;" Goth. hups "hip;" from PIE base *keu- "to bend."

The currently used term in Pers. is moka'ab (مکعب), loan from Ar., from ka'b (کعب) "talus, anklebone, heel; die." There are several Pers. equivalents for the concepts "talus, anklebone; die," one of which qâb, variants qâp and in Tabari kâb "heel, talus." This dictionary adopts kâb, which has already been introduced by other sources.

A number which taken three times as a factor produces another number, the cube of the given factor.

→ cube; → root.

An → integer of the form n³, where n is a → positive number. In other words, a → perfect power when k = 3.

→ perfect; → cube.