R gray


Asa [ey-suh] , 1810–88, U.S. botanist.
Robert, 1755–1806, U.S. explorer and sea captain: discovered the Columbia River.
Thomas, 1716–71, English poet.
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World English Dictionary
gray1 (ɡreɪ)
adj, —n, —vb
a variant spelling (now esp US) of grey

gray2 (ɡreɪ)
Gy the derived SI unit of absorbed ionizing radiation dose or kerma equivalent to an absorption per unit mass of one joule per kilogram of irradiated material. 1 gray is equivalent to 100 rads
[C20: named after Louis Harold Gray (1905--65), English physicist]

Gray (ɡreɪ)
1.  Simon (James Holiday). born 1936, British writer: his plays include Butley (1971), The Common Pursuit (1988), Life Support (1997), and Japes (2001)
2.  Thomas. 1716--71, English poet, best known for his Elegy written in a Country Churchyard (1751)

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

O.E. græg (Mercian grei), from P.Gmc. *græwyaz (cf. O.N. grar, O.Fris. gre, Du. graw, Ger. grau), from PIE *ghreghwos, but no certain cognates outside Gmc. The distinction between British grey and U.S. gray developed 20c. Gray as figurative for "Southern troops in the U.S. Civil War" is first
recorded 1863, in reference to their uniform color.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

gray (grā)
Abbr. Gy
A unit for a specific absorbed dose of radiation equal to 100 rads.

Gray (grā), Henry. 1825?-1861.

British anatomist whose work Anatomy, Descriptive and Surgical (1858), known as Gray's Anatomy, remains a standard text.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
gray   (grā)  Pronunciation Key 
The SI derived unit used to measure the energy absorbed by a substance per unit weight of the substance when exposed to radiation. One gray is equal to one joule per kilogram, or 100 rads. The gray is named after British physicist Louis Harold Gray (1905-1965).
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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