Part 803

The term equatorial, or equatorial instrument, is sometimes applied to any astronomical instrument which has its principal axis of rotation parallel to the axis of the earth.

E`qua*to"ri*al*ly, adv. So as to have motion or direction parallel to the equator.

Eq"uer*ry (?; 277), n.; pl. Equerries (#). [F. écurie stable, for older escurie, escuirie (confused somewhat with F. écuyer, OF. escuyer, squire), LL. scuria, OHG. skiura, sc&?;ra, barn, shed, G. scheuer, from a root meaning to cover, protect, and akin to L. scutum shield. See Esquire, and cf. Ecurie, Querry.] 1. A large stable or lodge for horses. Johnson.

2. An officer of princes or nobles, charged with the care of their horses.

In England equerries are officers of the royal household in the department of the Master of the Horse.

Eq"ue*ry (?), n. Same as Equerry.

E*ques"tri*an (?), a. [L. equester, from eques horseman, fr. equus horse: cf. F. équestre. See Equine.] 1. Of or pertaining to horses or horsemen, or to horsemanship; as, equestrian feats, or games.

2. Being or riding on horseback; mounted; as, an equestrian statue.

An equestrian lady appeared upon the plains.

Spectator.

3. Belonging to, or composed of, the ancient Roman equities or knights; as, the equestrian order. Burke.

E*ques"tri*an, n. One who rides on horseback; a horseman; a rider.

E*ques"tri*an*ism (?), n. The art of riding on horseback; performance on horseback; horsemanship; as, feats equestrianism.

E*ques"tri*enne` (?), n. [Formed after analogy of the French language.] A woman skilled in equestrianism; a horsewoman.

E"qui- (?). [L. aequus equal. See Equal.] A prefix, meaning equally; as, equidistant; equiangular.

E"qui*an`gled (?), a. [Equi- + angle.] Equiangular. [Obs.] Boyle.

E`qui*an"gu*lar (?), a. [Equi- + angular. Cf. Equangular.] Having equal angles; as, an equiangular figure; a square is equiangular.

Equiangular spiral. (Math.) See under Spiral, n. -- Mutually equiangular, applied to two figures, when every angle of the one has its equal among the angles of the other.

E`qui*bal"ance (?), n. [Equi- + balance.] Equal weight; equiponderance.

E`qui*bal"ance, v. t. [imp. & p. p. Equibalanced (?); p. pr. & vb. n. Equibalancing (?).] To make of equal weight; to balance equally; to counterbalance; to equiponderate.

E`qui*cres"cent (?), a. [Equi- + crescent.] (Math.) Increasing by equal increments; as, an equicrescent variable.

E`qui*cru"ral (?), a. [L. aequicrurius; aequus equal + crus, cruris, leg.] Having equal legs or sides; isosceles. [R.] "Equicrural triangles." Sir T. Browne.

E"qui*crure (?), a. Equicrural. [Obs.]

E`qui*dif"fer*ent (?), a. [Equi- + different: cf. F. équidifférent.] Having equal differences; as, the terms of arithmetical progression are equidifferent.

E`qui*dis"tance (?), n. Equal distance.

E`qui*dis"tant (?), a. [L. aequidistans, -antis; aequus equal + distans distant: cf. F. équidistant.] Being at an equal distance from the same point or thing. -- E`qui*dis"tant*ly, adv. Sir T. Browne.

E`qui*di*ur"nal (?), a. [Equi- + diurnal.] Pertaining to the time of equal day and night; -- applied to the equinoctial line. Whewell.

E"qui*form (?), a. [L. aequiformis; aequus equal + forma form.] Having the same form; uniform. -- E`qui*for"mi*ty (#), n. Sir T. Browne.