noun
blood moon
Refers to the reddish appearance of the moon during a total lunar eclipse. A loanword from English, used in astronomical and popular contexts.
今夜はブラッドムーンが見られるらしい。
It seems we can see a blood moon tonight.
ブラッドムーンは皆既月食のときに現れる。
A blood moon appears during a total lunar eclipse.