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gray

 [gra]
the SI unit of absorbed radiation dose, defined as the transfer of 1 joule of energy per kilogram of absorbing material (1 J/kg); 1 gray equals 100 rads.

gray (Gy),

(grā),
The SI unit of absorbed dose of ionizing radiation, equivalent to 1 J/kg of tissue; 1 Gy = 100 rad.
Synonym(s): griseus
[Louis H. Gray, British radiologist, 1905-1965]

gray

(gra)
1. of a hue between white and black.
2. a unit of absorbed radiation dose equal to 100 rads. Abbreviated Gy.

gray (Gy)

the SI unit of absorbed radiation dose. One gray equals the energy equivalent of 1 J/kg of matter; 1 Gy equals 100 rad. See also radiation absorbed dose.
Radiation oncology noun The SI unit for radiation, based on actual radiation absorption, as measured by a thermoluminescent dosimeter placed within a patient or a phantom; 1 Gy is equal to 1 joule/kg of absorber, roughly equivalent to 100 rads
Vox populi adjective Referring to an older person, usually at or near the age of retirement

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

gray

(grā)
The SI unit of absorbed dose of ionizing radiation, equivalent to 1 J/kg of tissue; 1 Gy = 100 rad.
[Louis H. Gray, British radiologist, 1905-1965]

gray

A unit of absorbed dose of radiation equal to an energy absorption of 1 Joule per kilogram of irradiated material. 1 Gy is equivalent to 100 RADS. In radiotherapy, radiation is commonly applied to the area of the tumour in a dosage of around 2 Gy a day, five days a week for periods of 3–6 weeks.

gray

(Gy) (grā)
The SI unit of absorbed dose of ionizing radiation, equivalent to 1 J/kg of tissue; 1 Gy = 100 rad.
[Louis H. Gray, British radiologist, 1905-1965]

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.
References in classic literature ?
It introduced Gray as the original inventor of the telephone, and ordered its lawyers to take action at once against the Bell Company for infringement of the Gray patent.
He stepped over to the nearest tree--an old, old one with gray lichen all over its bark, but upholding a curtain of tangled sprays and branches.
Alexander Smollett, master; David Livesey, ship's doctor; Abraham Gray, carpenter's mate; John Trelawney, owner; John Hunter and Richard Joyce, owner's servants, landsmen--being all that is left faithful of the ship's company--with stores for ten days at short rations, came ashore this day and flew British colours on the log-house in Treasure Island.
The gray ordered me to stand by him; and much discourse passed between him and his friend concerning me, as I found by the stranger's often looking on me, and the frequent repetition of the word YAHOO.
I forget; but it is what Dorian Gray has been to me.
I am tired to-night,--very tired with new things, Gray Brother,--but bring me the news always.
That stately form, combining the leader and the saint, so gray, so dimly seen, in such an ancient garb, could only belong to some old champion of the righteous cause, whom the oppressor's drum had summoned from his grave.
He strews the seeds of anxiety upon the decks of scudding ships, makes the foam-stripped ocean look old, and sprinkles with gray hairs the heads of ship-masters in the homeward-bound ships running for the Channel.
But for Akela and Gray Brother here," Mowgli said, at the end, "I could have done nothing.
We were tired with our journey and chilled by our drive, so we took a gray view of the place.
Curious glassy gray eyes they have, under red tufts, and they just sat and gloated and gloated.
They had taken the sparkle from her eyes and left them a sober gray; they had taken the red from her cheeks and lips, and they were gray also.