noun
reeled thread
Abbreviation of かせ糸; refers specifically to thread that has been wound onto a reel or spool.
See also: かせ糸 (かせいと)
かせ糸は、かせに巻かれた糸のことです。
Kaseito is thread wound into a skein.
かせ糸 explicitly means 'reeled thread', while かせ alone can refer to the hank or skein itself.
The origin is uncertain; the word is native Japanese and has been used historically in textile contexts.