From moon + struck (adjective), possibly coined by the English poet and polemicist John Milton (1608–1674): see the quotation. Compare Byzantine Greek σεληνόβλητος (selēnóblētos), σεληνόπληκτος (selēnóplēktos), German mondsüchtig, and German Low German maansüchtig, which also refer to being struck by the moon.