noun, noun which may take the genitive case particle 'no'
Refers to the fiber from sheep; used as a noun or with の to modify another noun.
このセーターは羊毛でできている。
This sweater is made of wool.
羊毛の靴下は暖かい。
Wool socks are warm.
ウール is a loanword from English, often used in fashion or textile contexts, while 羊毛 is the native Japanese term and can sound more traditional or agricultural.
Compound of 羊 (sheep) and 毛 (hair/fur). The reading ようもう is the on'yomi for both characters.