Usage Note
Tex is a technical unit used in the textile industry to express the linear mass density of fibres or yarns: one tex equals one gram per kilometre of thread. It is an international standard unit and is invariable in the plural. Learners will most likely encounter it in fabric or craft contexts.
Examples
"Ce fil a une densité de 20 tex."
Natural Translation
This thread has a density of 20 tex.

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