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Meanings
1
moxa; dried mugwort for moxibustion
Specifically the dried, processed mugwort leaf used as a combustible material in moxibustion (灸). Often sold in cones or sticks.
See also: 灸
When doing moxibustion, you burn moxa on the skin.
2
Japanese mugwort; Artemisia princeps
The plant itself, a perennial herb native to Japan. Its leaves are used to make moxa, and young leaves are sometimes eaten as a wild vegetable.
See also: よもぎ
Yomogi is the plant that becomes the raw material for moxa.