noun
Astronomical term for a configuration where two celestial bodies have an angular separation of 90 degrees.
月が矩にあるとき、太陽と月の角度は約90度になる。
When the moon is in quadrature, the angle between the sun and the moon is about 90 degrees.
noun
Rare term for a carpenter's square; the more common reading is かね. See 矩 (かね).
See also: 矩 (かね)
大工道具の矩は、今ではほとんど使われない呼び方だ。
The term 矩 (く) for a carpenter's square is rarely used nowadays.