energy unit

NOUN
11 LETTERS · STARTS WITH E

energy unit is a valid 11-letter word worth 14 points in Scrabble and 17 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
E1N1E1R1G2Y4U1N1I1T1
1 + 1 + 1 + 1 + 2 + 4 + 0 + 1 + 1 + 1 + 1 =14 PTS
DOUBLE WORD → 28TRIPLE WORD → 42
MEANING

What does energy unit mean?