noun
double flower; double blossom
Botanical term for a flower with extra petals, often due to mutation or cultivation.
このバラは重弁花で、花びらが何層にも重なっている。
This rose is a double flower, with petals layered in many tiers.
Compound of 重 (じゅう, 'multiple' or 'layered'), 弁 (べん, 'petal'), and 花 (か, 'flower').