noun
Technical term for rayon, a synthetic fiber made from cellulose. Used in textile and manufacturing contexts.
このシャツは人造絹糸でできている。
This shirt is made of rayon.
レーヨン is the common katakana loanword for rayon, while 人造絹糸 is a more formal, kanji-based term.
Compound of 人造 (artificial, man-made) and 絹糸 (silk thread), literally 'artificial silk thread'. The term was coined to describe early synthetic fibers that imitated silk.