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The time when the sun enters one of the equinoctial points, that is, about March 21 and September 22. See Autumnal equinox, Vernal equinox, under Autumnal and Vernal. When descends on the Atlantic The gigantic Stormwind of the equinox. Longfellow.

s on a fortified place, in which ladders are used to pass a ditch or mount a rampart. Sin enters, not by escalade, but by cunning or treachery. Buckminster.

he moon's motion is its orbit to the attraction of the sun, by which the equation of the center is diminished at the syzygies, and increased at the quadratures by about 1º 20'.

An affair in hand; business; enterprise. [Obs.] "Leave we him to his events." Shak.

radually wound upon the former, or unwound from it. See Involute. It is the locus of the centers of all the circles which are osculatory to the given curve or evolvent.

Out of the center.

One-sided; having the normally central portion not in the true center. Gray.

rvous system concerned in reflex action, by which impressions are transmitted to a nerve center and then reflected back so as to produce muscular contraction without sensation or volition.

See Exigenter.

An expedition; enterprise; adventure. [Obs.] Forwarding this dear expedience. Shak.

An important enterprise, implying a change of place; especially, a warlike enterprise; a march or a voyage with martial intentions; an excursion by a body of persons for a valuable end; as, a military, naval, exploring, or scientific expedition; also, the body of persons making such excursion. The expedition miserably…

An experimenter. [Obs.] Sir. K. Gigby.

nfirm or disprove something doubtful; esp., one under conditions determined by the experimenter; an act or operation undertaken in order to discover some unknown principle or effect, or to test, establish, or illustrate some suggest or known truth; practical test; poof. A political experiment can not be made in a labor…

One who makes experiments; an experimenter. Whaterly.

An experimenter. [R.]

An experimenter.

noble achievement; as, the exploits of Alexander the Great. Ripe for exploits and mighty enterprises. Shak.

ion, an equation which contains an exponential quantity, or in which the unknown quantity enters as an exponent. -- Exponential quantity (Math.), a quantity whose exponent is unknown or variable, as ax. -- Exponential series, a series derived from the development of exponential equations or quantities.…

terior Aqueous Chamber; m Crystalline Lens; n Vitreous Humor; o Retina; p Yellow spot; q Center of blind spot; r Artery of Retina in center of the Optic Nerve.

orehead to the front efge of the upper jaw bone, and another (cd) from this point to the center of the external auditory opening. See Gnathic index, under Gnathic.