octant

octant
—octantal /ok tan"tl/, adj.
/ok"teuhnt/, n.
1. the eighth part of a circle.
2. Math. any of the eight parts into which three mutually perpendicular planes divide space.
3. an instrument having an arc of 24°, used by navigators for measuring angles up to 90°.
4. the position of one heavenly body when 45° distant from another.
5. (cap.) Astron. the constellation Octans.
[1680-90; < L octant- (s. of octans); see OCTANS]

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  • octant — OCTÁNT, octante, s.n. 1. Instrument de navigaţie maritimă şi aeriană sau care serveşte la măsurarea înălţimii aştrilor, a distanţelor lor unghiulare etc. 2. A opta parte din circumferinţa unui cerc sau dintr o suprafaţă circulară. ♦ Fiecare… …   Dicționar Român

  • octant — [ ɔktɑ̃ ] n. m. • 1619; lat. octans « huitième partie » 1 ♦ Géom. Arc de 45° (huitième de cercle). 2 ♦ Mar. anc. Instrument du genre du sextant, mais dont le limbe n est que de 45°. ● octant nom masculin (latin octans, antis) Huitième partie du… …   Encyclopédie Universelle

  • octant — (n.) instrument for making angular measurements in navigation or astronomy, 1731, from L.L. octans the eighth part, from octo eight (see OCTA (Cf. octa )) on analogy of QUADRANT (Cf. quadrant). In geometry, octant meant the eighth part of a… …   Etymology dictionary

  • Octant — Oc tant, n. [L. octans, antis. fr. octo eight. See {Octave}.] 1. (Geom.) The eighth part of a circle; an arc of 45 degrees. [1913 Webster] 2. (Astron. & Astrol.) The position or aspect of a heavenly body, as the moon or a planet, when half way… …   The Collaborative International Dictionary of English

  • Octant — (v. lat.), 1) (Spiegeloctant, Sphärischer O.), ein astronomisches, auch zur See gebräuchliches Instrument, der achte Theil eines Kreises, mit welchem man durch doppelte Reflexion Winkel messen kann; meistens wird es zum Messen der Sonnenhöhe… …   Pierer's Universal-Lexikon

  • octant — [äk′tənt] n. [LL octans, eighth part < L octo,EIGHT] 1. an eighth of a circle; 45° angle or arc 2. an instrument like the sextant, for measuring angles 3. Astron. the position of one celestial body when it is 45° distant from another 4. Math.… …   English World dictionary

  • Octant — For other uses, see Octant (disambiguation). Three axial planes (x=0, y=0, z=0) divide space into eight equal octant domains, each with a coordinate signs from ( , , ) to (+,+,+). An octant is one of eight divisions. Contents …   Wikipedia

  • Octant — Pour les articles homonymes, voir Octant (homonymie). Octant Vue de la constellation …   Wikipédia en Français

  • octant — oktantas statusas T sritis Standartizacija ir metrologija apibrėžtis Kampinio atstumo tarp kosminių kūnų matuoklis. atitikmenys: angl. octant rus. октант, m pranc. octant, m ryšiai: susijęs terminas – kvadrantas susijęs terminas – kvadrantas… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • octant — oktantas statusas T sritis Standartizacija ir metrologija apibrėžtis Kampų matuoklis. atitikmenys: angl. octant rus. октант, m pranc. octant, m ryšiai: susijęs terminas – kvadrantas susijęs terminas – kvadrantas susijęs terminas – kvadrantas… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • octant — oktantas statusas T sritis Standartizacija ir metrologija apibrėžtis Viena iš aštuonių sričių, į kurias dalijama erdvė. atitikmenys: angl. octant rus. октант, m pranc. octant, m ryšiai: susijęs terminas – kvadrantas susijęs terminas – kvadrantas… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

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