grayn.
/ɡreɪ/, U.S. /ɡreɪ/ The SI unit of absorbed dose of ionizing radiation, corresponding to the absorption of one joule of energy per kilogram of irradiated material. Symbol Gy. Cf. rad n.6
ΘΚΠ
the world > health and disease > healing > medical treatment > treatment by radiation > [noun] > dose or dosage > unit of
rad1918
N1942
gray1975
1975 Metrologia 11 41/1 The Comité Consultatif des Unités..Recommends the adoption of special names for the SI-units of the following quantities of radiology:..SI-unit for absorbed dose: gray, symbol Gy.
1986 New Scientist 12 June 29/3 After a dose of between 8 and 12 grays, the person..would die from failure of the bone marrow unless rescued by a bone-marrow transplant.
1995 F. Barnaby in D. Holdstock & F. Barnaby Hiroshima & Nagasaki i. 4 The initial radiation dose at the hypocentre in Hiroshima was about 240 Grays.
2011 Evening Times (Glasgow) (Nexis) 14 Mar. 17 This researcher absorbed 1000 grays of radiation, about 200 times a lethal dose, when a beam hit him in the face.
This entry has been updated (OED Third Edition, December 2013; most recently modified version published online March 2022).
> see also
also refers to : greygrayadj.n.
also refers to : greygrayv.
<
n.1975see also