形容詞 menstrual:

1. of or relating to menstruation or the menses
   同義詞：catamenial

1. The first menstrual period, usually occurring during puberty.
   月經(jīng)初期第一次月經(jīng)期，通常發(fā)生于青春期
2. Abnormally heavy or extended menstrual flow.
   月經(jīng)過(guò)多異常多或長(zhǎng)時(shí)間的月經(jīng)來(lái)潮

men.stru.al

adj.（形容詞）
Of or relating to menstruation.
月經(jīng)的或與月經(jīng)有關(guān)的

Taking place on a monthly basis.
每月發(fā)生一次的
Lasting for one month.
持續(xù)一個(gè)月的

來(lái)源：
Middle English
中古英語(yǔ)
from Old French menstruel
源自 古法語(yǔ) menstruel
from Latin mônstru3lis
源自 拉丁語(yǔ) mônstru3lis
from mônstruus [menstrual]
源自 mônstruus [月經(jīng)的]
from mônsis [month] * see mô- 2
源自 mônsis [月] *參見(jiàn) mô- 2