newel

n. (螺旋型楼梯的)中心柱, 楼梯端柱
【化】 盘旋柱

new.el

n.（名词）
A vertical support at the center of a circular staircase.
螺旋楼梯中柱：环行楼梯中间的垂直支撑
A post that supports a handrail at the bottom or at the landing of a staircase.
楼梯柱：在楼梯底部支撑扶手的地方

来源：
Middle English nouel, niewel
中古英语 nouel, niewel
from Old French noiel
源自 古法语 noiel
from Vulgar Latin *nôdellus [little knot]
源自 俗拉丁语 *nôdellus [小结]
diminutive of Latin nôdulus [diminutive of] nôdus [knot] * see node
拉丁语 nôdulus的小后缀 [] nôdus的小后缀 [结] *参见 node