Equinox

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EQUINOX. The name given to two periods of the year when the days and nights are equal; that is, when the space of time between the rising and setting of the sun is one half of a natural day. Dig. 43, 13, 1, 8. Vide Day.

References in periodicals archive ?
on the mesh of equinoctial points. Equation (16) can be solved by prescribing the value of p(x, y) at node 1 to be some constant C, which lead to
(2) There is a ninth, outermost sphere (kurah kharijah anha muhitah), which defines the edge or boundary of the universe and supposedly contains no star (ghayr mukawkabah), posited to explain the daily motion of the heaven, whereas the motion of the eighth sphere (that of the fixed stars) is said to be due to the precession of the equinoctial points (nugtatd al-itidal).