[ee-kwuh-noks, ek-wuh-] /ˈi kwəˌnɒks, ˈɛk wə-/
the time when the sun crosses the plane of the earth’s equator, making night and day of approximately equal length all over the earth and occurring about March 21 (vernal equinox or spring equinox) and September 22 (autumnal equinox)
either of the points.
either of the two occasions, six months apart, when day and night are of equal length See vernal equinox, autumnal equinox
another name for equinoctial point
late 14c., from Old French equinoce (12c.) or directly from Medieval Latin equinoxium “equality of night (and day),” from Latin aequinoctium “the equinoxes,” from aequus “equal” (see equal (adj.)) + nox (genitive noctis) “night” (see night). The Old English translation was efnniht. Related: Equinoctial.
equinox [(ee-kwuh-noks, ek-wuh-noks)]
The twice yearly times when the lengths of day and night are equal. At equinox, the sun is directly over the Earth’s equator. The vernal equinox occurs about March 22 and the autumnal equinox about September 21.
- Equi NP deletion
noun, Linguistics. 1. a rule of transformational grammar that deletes the underlying subject of a complement clause if it is coreferential with the subject or object of the main clause, as in John promised to return the money, where the underlying subject (John) of return has been deleted.
/ˌiːkwɪˈnjuːmərəs/ adjective 1. (logic) having the same number of members
[ih-kwip] /ɪˈkwɪp/ verb (used with object), equipped, equipping. 1. to furnish or provide with whatever is needed for use or for any undertaking; fit out, as a ship or army: They spent several thousand dollars to equip their boat. 2. to dress; array: He equipped himself in all his finery. 3. to furnish with intellectual […]
/ˌɛkwɪpɑːˈtɪʃən/ noun 1. the equal division of the energy of a system in thermal equilibrium between different degrees of freedom. This principle was assumed to be exact in classical physics, but quantum theory shows that it is true only in certain special cases