There are 2 main definitions of gray in English:

Share this entry

gray 1

Line breaks: gray


US spelling of grey.

Words that rhyme with gray

affray, agley, aka, allay, Angers, A-OK, appellation contrôlée, array, assay, astray, au fait, auto-da-fé, away, aweigh, aye, bay, belay, betray, bey, Bombay, Bordet, boulevardier, bouquet, brae, bray, café au lait, Carné, cassoulet, Cathay, chassé, chevet, chez, chiné, clay, convey, Cray, crème brûlée, crudités, cuvée, cy-pres, day, decay, deejay, dégagé, distinguée, downplay, dray, Dufay, Dushanbe, eh, embay, engagé, essay, everyday, faraway, fay, fey, flay, fray, Frey, fromage frais, gainsay, Gaye, Genet, giclee, gilet, glissé, grey, halfway, hay, heigh, hey, hooray, Hubei, Hué, hurray, inveigh, jay, jeunesse dorée, José, Kay, Kaye, Klee, Kray, Lae, lay, lei, Littré, Lough Neagh, lwei, Mae, maguey, Malay, Mallarmé, Mandalay, Marseilles, may, midday, midway, mislay, misplay, Monterrey, Na-Dene, nay, né, née, neigh, Ney, noway, obey, O'Dea, okay, olé, outlay, outplay, outstay, outweigh, oyez, part-way, pay, Pei, per se, pince-nez, play, portray, pray, prey, purvey, qua, Quai d'Orsay, Rae, rangé, ray, re, reflet, relevé, roman-à-clef, Santa Fé, say, sei, Shar Pei, shay, slay, sleigh, sley, spae, spay, Spey, splay, spray, stay, straightaway, straightway, strathspey, stray, Sui, survey, sway, Taipei, Tay, they, today, tokay, Torbay, Tournai, trait, tray, trey, two-way, ukiyo-e, underlay, way, waylay, Wei, weigh, wey, Whangarei, whey, yea
Definition of gray in:
Share this entry

There are 2 main definitions of gray in English:

Share this entry
gray 2 Line breaks: gray
(abbreviation: Gy)


The SI unit of the absorbed dose of ionizing radiation, corresponding to one joule per kilogram.
Example sentences
  • The sievert is numerically equivalent to the gray for electrons and for X-rays irradiating the whole body.
  • Radiation doses are measured in rads or grays, where 1 gray equals 100 rads.
  • Thus for these particular radiations the dose equivalent in sieverts is numerically equal to the absorbed dose in grays.


1970s: named after Louis H. Gray (1905–65), English radiobiologist.

Definition of gray in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove adverts and access premium resources