x-ray
x-ray
UK[ˈeks reɪ]US[ˈeks reɪ]
n
a type of radiation that can pass through objects that are not transparent, allowing pictures of the inside of them to be made
n
a picture made by using x-rays, especially one showing bones or organs inside the body
v
to photograph or examine something using x-rays
Etymology
the term was coined in 1895 by the german physicist wilhelm röntgen, who discovered this new form of radiation. he designated it "x-strahlen" (x-rays), using the mathematical symbol "x" to denote its unknown nature, combined with "strahlen," the german word for rays. the english translation "x-rays" directly adopted this nomenclature, with "ray" replacing "strahlen." over time, the term evolved from a purely scientific label for the radiation to also encompass the photographic process and the resulting image, solidifying its place in medical and technical vocabulary.
Analysis
the word "x-ray" is a compound formed from the algebraic symbol "x" (representing an unknown quantity) and the noun "ray" (a line of light or radiation). it functions as a single lexical unit.
Examples
the doctor ordered an x-ray to check for a fracture in his wrist.
the security scanner uses a low-dose x-ray to inspect luggage.
all passengers will have their bags x-rayed before boarding the flight.