Gray (redirected from grayest)

gray (gra)

1. of a hue between white and black.

2. a unit of absorbed radiation dose equal to 100 rads. Abbreviated Gy.

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Gray, Henry 1825?-1861.

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

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gray (gr)

n. Abbr. Gy

A unit for a specific absorbed dose of radiation equal to 100 rads.

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Gray (Gy),

n a unit of measurement for an absorbed dose of radiation, from the French
Systéme International d'Unités; converts to the traditional rad by the formula 100 rad = 1 Gy.

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gray Gy Radiation physics The SI unit for radiation, based on actual radiation absorption, as measured by a thermoluminescent dosimeter placed within a Pt or a phantom; 1 Gy is equal to 1 joule/kg of absorber–100 rads