|—adj, —n, —vb|
|a variant spelling (now esp US) of grey|
|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]|
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.