矩
く
Meanings
1
Astronomical term for a configuration where two celestial bodies have an angular separation of 90 degrees.
When the moon is in quadrature, the angle between the sun and the moon is about 90 degrees.
2
rare term
Rare term for a carpenter's square; the more common reading is かね. See 矩 (かね).
See also: 矩 (かね)
The term 矩 (く) for a carpenter's square is rarely used nowadays.