horizontal plane

16 LETTERS · STARTS WITH H

horizontal plane is a valid 16-letter word worth 29 points in Scrabble and 33 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

H4O1R1I1Z10O1N1T1A1L1P3L1A1N1E1

4 + 1 + 1 + 1 + 10 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 =29 PTS

DOUBLE WORD → 58TRIPLE WORD → 87

MEANING

What does horizontal plane mean?