Equatorial E`qua*to"ri*al, n. (Astron.) An instrument consisting of a telescope so mounted as to have two axes of motion at right angles to each other, one of them parallel to the axis of the earth, and each carrying a graduated circle, the one for measuring declination, and the other right ascension, or the hour angle, so that the telescope may be directed, even in the daytime, to any star or other object whose right ascension and declination are known. The motion in right ascension is sometimes communicated by clockwork, so as to keep the object constantly in the field of the telescope. Called also an {equatorial telescope}. [1913 Webster]

Note: 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. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • équatorial — équatorial, iale, iaux [ ekwatɔrjal, jo ] adj. et n. m. • 1778; de équateur I ♦ Adj. 1 ♦ Relatif à l équateur terrestre. La zone équatoriale, comprise entre les deux tropiques et traversée en son milieu par l équateur. Forêt équatoriale. Les… …   Encyclopédie Universelle

  • Equatorial — has different meanings:* In geography it relates to the equator of the Earth. * In meteorology, an Equatorial climate is the type of climate experienced near the equator. * In geometry, it refers to the ring shaped outer boundary of the cross… …   Wikipedia

  • Equatorial — Équatorial Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom …   Wikipédia en Français

  • Equatorial — E qua*to ri*al, a. [Cf. F. [ e]quatorial.] Of or pertaining to the equator; as, equatorial climates; also, pertaining to an equatorial instrument. [1913 Webster] …   The Collaborative International Dictionary of English

  • equatorial — [ē΄kwə tôr′ē əl, ek΄wətôr′ē əl] adj. 1. of or near the earth s equator 2. of any equator 3. like or characteristic of conditions near the earth s equator [equatorial heat] 4. designating or of a telescope mounted in such a way as to have two axes …   English World dictionary

  • equatorial — adj. 2 g. 1. Do equador ou a ele relativo. 2. Que está situado no equador ou em suas proximidades. 3. Instrumento com que se mede a ascensão e a declinação reta dos astros. 4. linha equatorial: equador …   Dicionário da Língua Portuguesa

  • équatorial — équatorial, ale (é koua to ri al, a l ) adj. 1°   Qui appartient à l équateur.    Les climats équatoriaux, climats voisins de l équateur terrestre. Plante équatoriale, plante qui naît et prospère dans les régions équatoriales.    Qui se rapproche …   Dictionnaire de la Langue Française d'Émile Littré

  • equatorial — EQUATORIÁL, Ă adj. v. ecuatorial. Trimis de LauraGellner, 13.09.2007. Sursa: DN …   Dicționar Român

  • equatorial — 1660s, from EQUATOR (Cf. equator) + AL (Cf. al) (1) …   Etymology dictionary

  • equatorial — ► ADJECTIVE ▪ of, at, or near the equator. DERIVATIVES equatorially adverb …   English terms dictionary

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