fre.num
n.（名词）【复数】 fre.nums 或 fre.na [-n…] 【解剖学】 A membranous fold of skin or mucous membrane that supports or restricts the movement of a part or organ, such as the small band of tissue that connects the underside of the tongue to the floor of the mouth.系褶：皮肤的一种膜状褶或粘膜用来支持或限制某部位或器官的运动，例如连接舌下部和口腔底部的一小段组织
来源：Latin frônum [bridle] 拉丁语 frônum [缰绳] from frendere [to grind] * see ghrendh- 源自 frendere [碾磨] *参见 ghrendh-
