phototactically

15 LETTERS · 6 SYLLABLES · STARTS WITH P

phototactically is a valid 15-letter word worth 27 points in Scrabble and 30 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

P3H4O1T1O1T1A1C3T1I1C3A1L1L1Y4

3 + 4 + 1 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 3 + 1 + 1 + 1 + 4 =27 PTS

DOUBLE WORD → 54TRIPLE WORD → 81

MEANING

What does phototactically mean?