guard cell

10 LETTERS · STARTS WITH G

guard cell is a valid 10-letter word worth 13 points in Scrabble and 18 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

G2U1A1R1D2C3E1L1L1

2 + 1 + 1 + 1 + 2 + 0 + 3 + 1 + 1 + 1 =13 PTS

DOUBLE WORD → 26TRIPLE WORD → 39

MEANING

What does guard cell mean?