English-Thai Dictionary

quadrant

N หนึ่งในสี่ ส่วน ของ วงกลม  สิ่ง ที่ คล้าย ของ วงกลม  quarter nuang-nai-se-suan-kong-wong-klom

 

quadrantal

ADJ ซึ่ง เป็น หนึ่งในสี่ ส่วน ของ วงกลม  sueng-pen-nuang-nai-se-suan-kong-wong-klom

 

Webster's 1828 Dictionary

QUADRANT

n.[L. quadrans, a fourth. ] 1. The fourth part; the quarter.
2. In geometry, the quarter of a circle; the arc of a circle containing ninety degrees; also, the space or area included between this arc and two radii drawn from the center to each extremity.
3. An instrument for taking the altitudes of the sun or stars, of great use in astronomy and navigation. Quadrants are variously made, but they all consist of the quarter of a circle whose limb is divided into ninety degrees; or, as in Hadley's reflecting quadrant, an arc of forty five degrees is made to serve the same purpose as an arc of ninety degrees.
Quadrant of altitude, an appendage of the artificial globe, consisting of a slip of brass of the length of a quadrant of one of the great circles of the globe, and graduated. It is filled to the meridian and movable round to all points of the horizon. It serves as a scale in measuring altitudes, azimuths, etc.

 

QUADRANTAL

a.[supra. ] Pertaining to a quadrant; also, included in the fourth part of a circle; as quadrantal space.

 

QUADRANTAL

n.[supra. ] A vessel used by the Romans; originally called amphora. It was square and contained 8 pounds of water.

 

Webster's 1913 Dictionary

QUADRANT

Quad "rant, n. Etym: [L. quadrans, -antis, a fourth part, a fourth of a whole, fr. quattuor four: cf. F. quadrant, cadran. See Four, and cf. Cadrans. ]

 

1. The fourth part; the quarter. [Obs. ] Sir T. Browne.

 

2. (Geom.)

 

Defn: The quarter of a circle, or of the circumference of a circle, an arc of 9 º, or one subtending a right angle at the center.

 

3. (Anal. (Geom.)

 

Defn: One of the four parts into which a plane is divided by the coördinate axes. The upper right-hand part is the first quadrant; the upper left-hand part the second; the lower left-hand part the third; and the lower right-hand part the fourth quadrant.

 

4. An instrument for measuring altitudes, variously constructed and mounted for different specific uses in astronomy, surveying, gunnery, etc. , consisting commonly of a graduated arc of 9 º, with an index or vernier, and either plain or telescopic sights, and usually having a plumb line or spirit level for fixing the vertical or horizontal direction. Gunner's quadrant, an instrument consisting of a graduated limb, with a plumb line or spirit level, and an arm by which it is applied to a cannon or mortar in adjusting it to the elevation required for attaining the desired range. -- Gunter's quadrant. See Gunter's quadrant, in the Vocabulary. Hadley's quadrant, a hand instrument used chiefly at sea to measure the altitude of the sun or other celestial body in ascertaining the vessel's position. It consists of a frame in the form of an octant having a graduated scale upon its arc, and an index arm, or alidade pivoted at its apex. Mirrors, called the index glass and the horizon glass, are fixed one upon the index arm and the other upon one side of the frame, respectively. When the instrument is held upright, the index arm may be swung so that the index glass will reflect an image of the sun upon the horizon glass, and when the reflected image of the sun coincides, to the observer's eye, with the horizon as seen directly through an opening at the side of the horizon glass, the index shows the sun's altitude upon the scale; -- more properly, but less commonly, called an octant. -- Quadrant of altitude, an appendage of the artificial globe, consisting of a slip of brass of the length of a quadrant of one of the great circles of the globe, and graduated. It may be fitted to the meridian, and being movable round to all points of the horizon, serves as a scale in measuring altitudes, azimuths, etc.

 

QUADRANTAL

Quad *ran "tal, a. Etym: [L. quadrantalis containing the fourth fourth part of a measure. ] (Geom.)

 

Defn: Of or pertaining to a quadrant; also, included in the fourth part of a circle; as, quadrantal space. Quadrantal triangle, a spherical triangle having one side equal to a quadrant or arc of 9 º. -- Quadrantal versor, a versor that expresses rotation through one right angle.

 

QUADRANTAL

Quad *ran "tal, n. Etym: [L.]

 

1. (Rom. Antiq.)

 

Defn: A cubical vessel containing a Roman cubic foot, each side being a Roman square foot; -- used as a measure.

 

2. A cube. [R.]

 

New American Oxford Dictionary

quadrant

quad rant |ˈkwädrənt ˈkwɑdrənt | ▶noun technical each of four quarters of a circle. • each of four parts of a plane, sphere, space, or body divided by two lines or planes at right angles: the right upper quadrant of the kidney. • historical an instrument used for taking angular measurements of altitude in astronomy and navigation, typically consisting of a graduated quarter circle and a sighting mechanism. • a frame fixed to the head of a ship's rudder, to which the steering mechanism is attached. • a panel with slots through which a lever is moved to orient or otherwise control a mechanism. DERIVATIVES quad ran tal |kwäˈdran (t )l |adjective ORIGIN late Middle English (denoting the astronomical instrument ): from Latin quadrans, quadrant- ‘quarter, ’ from quattuor four.

 

Quadrantids

Quad ran tids |kwäˈdrantidz kwɑˈdræntɪdz |Astronomy an annual meteor shower with a radiant in the constellation Boötes, reaching a peak about January 3. ORIGIN from Latin Quadrans Muralis ‘the Mural Quadrant, ’ the name of a former constellation.

 

Oxford Dictionary

quadrant

quad |rant |ˈkwɒdr (ə )nt | ▶noun technical 1 each of four quarters of a circle. • each of four parts of a plane, sphere, space, or body divided by two lines or planes at right angles: the right upper quadrant of the kidney. 2 historical an instrument used for taking angular measurements of altitude in astronomy and navigation, typically consisting of a graduated quarter circle and a sighting mechanism. 3 a frame fixed to the head of a ship's rudder, to which the steering mechanism is attached. • a panel with slots through which a lever is moved to orient or otherwise control a mechanism. DERIVATIVES quadrantal |-ˈdrant (ə )l |adjective ORIGIN late Middle English (denoting the astronomical instrument ): from Latin quadrans, quadrant- ‘quarter ’, from quattuor ‘four ’.

 

Quadrantids

Quadrantids |kwɒˈdrantɪdz |Astronomy an annual meteor shower with a radiant in the constellation Boötes, reaching a peak about 3 January. ORIGIN from Latin Quadrans Muralis ‘the Mural Quadrant ’, the name of a former constellation.

 

Duden Dictionary

Quadrant

Qua d rant , Qua drant Substantiv, maskulin , der |Quadr a nt |der Quadrant; Genitiv: des Quadranten, Plural: die Quadranten lateinisch quadrans (Genitiv: quadrantis ) = der vierte Teil, substantiviertes 1. Partizip von: quadrare, quadrieren 1 a Geometrie, Geografie, Astronomie Viertel eines Kreises, besonders eines Meridians oder des Äquators b Mathematik Viertel einer Kreisfläche c Mathematik eines der vier Viertel, in die die Ebene eines ebenen rechtwinkligen Koordinatensystems durch das Achsenkreuz aufgeteilt ist der Punkt P (5, 3 ) liegt im ersten Quadranten 2 Astronomie, Seewesen (heute nicht mehr gebräuchliches ) Instrument zur Bestimmung der Höhe 4b von Gestirnen

 

French Dictionary

quadrant

quadrant n. m. nom masculin mathématiques Quart de circonférence du cercle. Prononciation La première syllabe se prononce généralement ka, parfois koua, [kadrɑ̃, kwadrɑ̃ ] Note Orthographique quadran t.

 

Sanseido Wisdom Dictionary

quadrant

quad rant /kwɑ́dr (ə )nt |kwɔ́d -/名詞 C 1 〘数 〙四分円, 四分円弧 .2 〘天 〙象限儀 （しようげんぎ ）〘円周の4分の1の目盛り盤を主体とする扇形の天体高度観測器; 四分儀 〙.