ultraviolet source

NOUN
18 LETTERS · STARTS WITH U

ultraviolet source is a valid 18-letter word worth 22 points in Scrabble and 28 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
U1L1T1R1A1V4I1O1L1E1T1S1O1U1R1C3E1
1 + 1 + 1 + 1 + 1 + 4 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 3 + 1 =22 PTS
DOUBLE WORD → 44TRIPLE WORD → 66
MEANING

What does ultraviolet source mean?

NOUN · 1 SENSE
1

Any source of illumination that emits ultraviolet radiation.