second period

NOUN
13 LETTERS · STARTS WITH S

second period is a valid 13-letter word worth 18 points in Scrabble and 21 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
S1E1C3O1N1D2P3E1R1I1O1D2
1 + 1 + 3 + 1 + 1 + 2 + 0 + 3 + 1 + 1 + 1 + 1 + 2 =18 PTS
DOUBLE WORD → 36TRIPLE WORD → 54
MEANING

What does second period mean?

NOUN · 1 SENSE
1

The second division into which the play of a game is divided.