companion cell

14 LETTERS · STARTS WITH C

companion cell is a valid 14-letter word worth 21 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

C3O1M3P3A1N1I1O1N1C3E1L1L1

3 + 1 + 3 + 3 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does companion cell mean?