noun
Botanical term for a single petal of a flower. In everyday conversation, 花びら (はなびら) is more common.
桜の花弁が風に舞っている。
Cherry blossom petals are dancing in the wind.
この花は花弁が6枚ある。
This flower has six petals.
Common, everyday word for petal. 花弁 is more technical and often used in botanical contexts.
Compound of 花 (flower) and 弁 (petal, valve). The kanji 弁 is a simplified form of 瓣, which originally depicted a melon's segments and later came to mean 'petal'.