intercalary meristem

20 LETTERS · STARTS WITH I

intercalary meristem is a valid 20-letter word worth 28 points in Scrabble and 32 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

I1N1T1E1R1C3A1L1A1R1Y4M3E1R1I1S1T1E1M3

1 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 4 + 0 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 3 =28 PTS

DOUBLE WORD → 56TRIPLE WORD → 84

MEANING

What does intercalary meristem mean?