Yes, ANGELUS is a Scrabble word!

Letter values in Scrabble US: A 1, N 1, G 2, E 1, L 1, U 1, S 1.

Is it a valid word?

ANGELUS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

the sound of a bell rung in Roman Catholic churches to announce the time when the Angelus should be recited
a prayer said 3 times a day by Roman Catholics in memory of the Annunciation

Also: angelus bell.