
1) Altitude finder 2) An arc of 90° 3) Angular unit 4) Australian literary magazine 5) Conservative magazine 6) Greek invention 7) Moon or horoscope division 8) One of four areas 9) One-fourth of a circle 10) Right angle
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https://www.crosswordclues.com/clue/quadrant

1) Arc 2) Quadrisection 3) Sector
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https://www.crosswordclues.com/clue/quadrant

- a quarter of the circumference of a circle
- a quarter of the circumference of a circle
- any of the four areas into which a plane is divided by two orthogonal coordinate axes
- the area enclosed by two perpendicular radii of a circle
- a measuring instrument for measuring altitude of heavenly bodies
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A navigation tool used to measure the altitude of the sun. Largely replaced by the back-staff.
Found on
http://black-bart.co.uk/html/pirate_glossary.html

• (n.) The fourth part; the quarter. • (n.) The quarter of a circle, or of the circumference of a circle, an arc of 90
Found on
http://thinkexist.com/dictionary/meaning/quadrant/

One of the four equal sections into which the dental arches can be divided; begins at the midline of the arch and extends distally to the last tooth.
Found on
http://www.ada.org/glossaryforprofessionals.aspx

(from the article `McAuley, James Phillip`) ...at the University of Sydney, he taught for a while, served with Australian forces in World War II, and then became a senior lecturer at the ...
Found on
http://www.britannica.com/eb/a-z/q/3

(from the article `Hadley, John`) In 1730, independently of Thomas Godfrey of Philadelphia, Hadley invented a quadrant (actually a double-reflecting octant) for measuring the ... The first instruments used at sea for elevation angle measurements seem to have been the quadrant and the astrolabe, long known to astronomers. For ... [2 ...
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http://www.britannica.com/eb/a-z/q/3

denotes one of four equal sections in the mouth. The upper right, upper left, lower right or the lower left.
Found on
http://www.cosmeticdentistryguide.co.uk/glossary.html

One of the four equal sections into which the dental arches can be divided; begins at the midline of the arch and extends backwards to the last tooth.
Found on
http://www.dentistryforomaha.com/patient-info/dental-glossary/

<dentistry> The four parts of your mouth, that is the upper left, the upper right, the lower left, and the lower right. ... (08 Jan 1998) ...
Found on
http://www.encyclo.co.uk/local/20973

(kwod´rәnt) one fourth of the circumference of a circle. one of four corresponding parts, as of the abdominal surface, the dentition, the field of vision, or the tympanic membrane.
Found on
http://www.encyclo.co.uk/local/21001

Instrument used in navigation for measuring altitude, made up of a quarter-circle of wood or metal marked with a graded scale of angles. From the late 16thC quadrants made of brass, or brass and mahogany, with a pivoted radius, or index arm, came into use.
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http://www.encyclo.co.uk/visitor-contributions.php

a device for measuring the height of stars in the sky which was used in the past for calculatingdirections when travelling across the sea
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http://www.encyclo.co.uk/visitor-contributions.php

Quad'rant noun [ Latin quadrans , -antis , a fourth part, a fourth of a whole, from quattuor four: confer French quadrant , cadran . See Four , and confer Cadrans .] 1. The fourth part; the quarter. [ Obsolete] Sir T. Browne. 2.
Found on
http://www.encyclo.co.uk/webster/Q/1

One quarter of a circle.
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http://www.gadsbywicks.co.uk/uploaded/3822.pdf

HMAS Quadrant was a British-built Australian Queensborough Class destroyer of 1705 tons displacement launched in 1942 and lent to the Royal Australian Navy in 1945. HMAS Quadrant was powered by two Admiralty 3-drum type boilers and carried a complement of 220. She was armed with four 4.7 inch guns; four 2 pdr guns; two 40 mm anti-aircraft guns; 20 ...
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http://www.probertencyclopaedia.com/browse/RQ.HTM
[Treasure Island] an instrument (later replaced by the sextant) used in navigating.
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https://www.cliffsnotes.com/literature/t/treasure-island/study-help/full-gl

Code name for the first Quebec conference (Churchill & Roosevelt)- August 1943
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https://www.encyclo.co.uk/local/20490
noun a quarter of the circumference of a circle
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https://www.encyclo.co.uk/local/20974
noun a measuring instrument for measuring altitude of heavenly bodies
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https://www.encyclo.co.uk/local/20974

One quarter of a circle. When plotting coordinates on a graph, the
x- and
y-axes may intersect to create four quadrants. The first quadrant lies in the region where both
x and
y are positive. The remaining three quadrants are numbered in an anticlockwise direction. ...
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https://www.encyclo.co.uk/local/21221

One of the four equal sections of the mouth. the upper right, upper left, lower right or the lower left.
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https://www.encyclo.co.uk/local/22242

a quarter of a circle; an arc of 90°. · the area included between such an arc and two radii drawn one to each extremity. · something shaped like a quarter of a circle, as a part of a machine. · one of the four parts into which a plane, as the face of a heavenly body, is divided by two perpendicular lines, numbered counterclockwis...
Found on
https://www.infoplease.com/dictionary/quadrant

One quarter (qua) of the plane on the Cartesian coordinate system. The plane is divided into 4 sections, each called a quadrant.
Found on
https://www.thoughtco.com/glossary-of-mathematics-definitions-4070804
No exact match found.