'Radiology' was coined after Rontgen's 1895 X-rays — literally 'the study of rays' from Latin 'radius.'
The science dealing with X-rays and other high-energy radiation, especially as used in medicine for diagnosis and treatment.
From Latin 'radius' (ray, spoke of a wheel, rod) combined with Greek '-logia' (study of, discourse about), from 'logos' (word, reason, account), from PIE *leǵ- (to collect, to gather, to speak). Coined shortly after Wilhelm Röntgen's discovery of X-rays in November 1895, the term entered medical vocabulary almost immediately as physicians recognized the diagnostic potential of the new rays. The Latin 'radius' originally meant the spoke of a wheel — a rod extending outward from a central hub — and was extended metaphorically to any beam radiating outward from a source: rays of light,
'Radiology,' 'radio,' 'radish,' and 'radical' all come from Latin 'radius' (ray, root). Radiology studies rays. Radio transmits by rays (electromagnetic waves). A radish is a 'root vegetable' (from 'radix,' root — related to 'radius'). And 'radical' means 'going to the root.' The spoke of a Roman
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