whorl

详细解释:n. 轮生体, 螺层, 螺旋状物, 涡
vt. 使成涡漩
【医】 螺环, 轮生体(植物), 涡(指纹)

英语解释：

名词 whorl:

a round shape formed by a series of concentric circles (as formed by leaves or flower petals)同义词：coil, roll, curl, curlicue, ringlet, gyre, scroll