noun
Refers to the plant, the fiber, or cotton fabric.
このシャツは綿100%です。
This shirt is 100% cotton.
綿の栽培には暖かい気候が必要だ。
Cotton cultivation requires a warm climate.
The kanji 綿 is a phono-semantic compound: 糸 (thread) + 帛 (silk), originally referring to silk floss, later extended to cotton. The reading めん is the on'yomi.