cobalt 60

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noun Chemistry.

a radioactive isotope of cobalt having a mass number of 60 and a half-life of 5.2 years, used chiefly in radiotherapy.

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Origin of cobalt 60

First recorded in 1945–50

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Ultimately Cobalt housed, at one point or another, nearly half of the 119 detainees identified by the report.
Inside the CIA’s Sadistic Dungeon|Tim Mak|December 9, 2014|DAILY BEAST
Ridha al-Najjar was the first to be held at detention site Cobalt.
Inside the CIA’s Sadistic Dungeon|Tim Mak|December 9, 2014|DAILY BEAST
Self-described 9/11 mastermind Khalid Sheikh Mohammed was also kept at Cobalt after his March 2003 in Pakistan.
Inside the CIA’s Sadistic Dungeon|Tim Mak|December 9, 2014|DAILY BEAST
In fact, four of 20 cells at Cobalt were found to have bars across the cell to allow this.
Inside the CIA’s Sadistic Dungeon|Tim Mak|December 9, 2014|DAILY BEAST

In Aug. 2003, Muller said he believed Cobalt was merely a holding facility.
Inside the CIA’s Sadistic Dungeon|Tim Mak|December 9, 2014|DAILY BEAST
Three are mentioned by Cennino—indigo, a cobalt, and ultramarine.
Blackwood's Edinburgh Magazine, Volume 57, No. 356, June, 1845|Various
Our scientists say the gases of the comet in some unexplained way altered the iron in the hmoglobin of our blood to cobalt.
The Onslaught from Rigel|Fletcher Pratt
Then he did his job: he pressed a button which released two shards of fire metal in a housing of cobalt.
The Jewels of Aptor|Samuel R. Delany
The ore of cobalt, called zaffre, is found in several parts of Europe, but chiefly in Saxony.
Heads of Lectures on a Course of Experimental Philosophy: Particularly Including Chemistry|Joseph Priestley
The calx of cobalt is of a deep blue colour, which, when fused, makes the blue glass called smalt.
Heads of Lectures on a Course of Experimental Philosophy: Particularly Including Chemistry|Joseph Priestley

cobalt 60

[ (koh-bawlt) ]

A radioactive isotope produced when neutrons bombard atoms of the element cobalt.

Cobalt 60 is a common substance used in radiation therapy for cancer.