noun
flower-shaped family crest
A traditional Japanese family crest (kamon) design featuring a stylized flower-diamond pattern.
彼の家の花菱は、菱形の中に花をあしらった美しい紋です。
His family's hanabishi is a beautiful crest with a flower arranged inside a diamond shape.
家紋 is the general term for family crest, while 花菱 refers to a specific design.
Compound of 花 (hana, 'flower') and 菱 (hishi, 'water chestnut' or 'diamond shape'), referring to the crest's design.