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Meaning of x unit | Babel Free

Noun CEFR B2

Definitions

A unit of length (symbol xu) approximately equal to 0.1 picometres, used to quote the wavelength of X-rays and gamma rays.

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

X-Acto X-aerogel X-ALD X-axis x-band X-bar