petaln.花瓣petalo-[医] 花瓣, 叶Petalodusn.瓣齿鱼 (瓣齿鱼目；瓣齿鱼科)petalodont瓣齿鱼类petal test花瓣测试Petaloneman.翅线藻属(双歧藻科)petalonine幅叶藻氨酸petal area花瓣区Petal sign花瓣征petaliform花瓣状的petalomania异瓣现象