noun
indigo ball; ball of fermented indigo leaves
Traditional dyeing material made from dried, ground, and fermented leaves of dyer's knotweed (藍). Used in Japanese indigo dyeing. Compare with 藍玉, which is a similar term.
See also: 藍玉
藍染めには玉藍を使います。
We use indigo balls for indigo dyeing.
玉藍を砕いて染料を作る。
Crush the indigo ball to make dye.