tube-shaped structure

NOUN
21 LETTERS · STARTS WITH T

tube-shaped structure is a valid 21-letter word worth 29 points in Scrabble and 34 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
T1U1B3E1-0S1H4A1P3E1D2S1T1R1U1C3T1U1R1E1
1 + 1 + 3 + 1 + 0 + 1 + 4 + 1 + 3 + 1 + 2 + 0 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 =29 PTS
DOUBLE WORD → 58TRIPLE WORD → 87
MEANING

What does tube-shaped structure mean?

NOUN · 1 SENSE