| gray | (noun) horse of a light gray or whitish color | Synonyms: grey |
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| (noun) clothing that is a grey color | Synonyms: grey |
| (noun) a neutral achromatic color midway between white and black | Synonyms: grayness, grey, greyness |
| (noun) any organization or party whose uniforms or badges are grey | Synonyms: grey |
| (noun) the SI unit of energy absorbed from ionizing radiation; equal to the absorption of one joule of radiation energy by one kilogram of matter; one gray equals 100 rad | Synonyms: Gy |
| grayback | (noun) a dowitcher with a grey back | Synonyms: greyback, Limnodromus griseus |
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| (noun) a sandpiper that breeds in the Arctic and winters in the Southern Hemisphere | Synonyms: Calidris canutus, greyback, knot |
| graybeard | (noun) a man who is very old | Synonyms: greybeard, Methuselah, old man |
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| grayhen | (noun) female black grouse | Synonyms: gray hen, grey hen, greyhen, heath hen |
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| graylag | (noun) common grey wild goose of Europe; ancestor of many domestic breeds | Synonyms: Anser anser, graylag goose, greylag, greylag goose |
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| grayness | (noun) a neutral achromatic color midway between white and black | Synonyms: gray, grey, greyness |
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