active principle

16 LETTERS · STARTS WITH A

active principle is a valid 16-letter word worth 26 points in Scrabble and 33 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
A1C3T1I1V4E1P3R1I1N1C3I1P3L1E1
1 + 3 + 1 + 1 + 4 + 1 + 0 + 3 + 1 + 1 + 1 + 3 + 1 + 3 + 1 + 1 =26 PTS
DOUBLE WORD → 52TRIPLE WORD → 78
MEANING

What does active principle mean?

1