bundle sheath

13 LETTERS · STARTS WITH B

bundle sheath is a valid 13-letter word worth 21 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

B3U1N1D2L1E1S1H4E1A1T1H4

3 + 1 + 1 + 2 + 1 + 1 + 0 + 1 + 4 + 1 + 1 + 1 + 4 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does bundle sheath mean?