sea bottom

NOUN
10 LETTERS · STARTS WITH S

sea bottom is a valid 10-letter word worth 13 points in Scrabble and 15 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
S1E1A1B3O1T1T1O1M3
1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 3 =13 PTS
DOUBLE WORD → 26TRIPLE WORD → 39
MEANING

What does sea bottom mean?