caul
/kɔːl/noun
1
- the amniotic membrane enclosing a fetus胎头羊膜。
1.1
- part of this membrane occasionally found on a child's head at birth, thought to bring good luck（出生婴儿头上的）胎头羊膜状东西（据信能带来好运气）。
2
- historical a woman's close-fitting indoor headdress or hairnet〈史〉（室内用）女子头饰, 发网。
3
- Anatomy the omentum【剖】网膜。
词源
Middle English: perhaps from Old French cale 'head covering'， but recorded earlier.