Is flake a word in the Scrabble Dictionary

Yes, flake is playable

...and is worth 13 points.

Found in the following dictionaries

Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)

"Flake" Definition

noun

A flat thin piece or layer; a chip.
A frame or platform for drying fish or produce.
A scaffold lowered over the side of a ship to support workers or caulkers.
A small crystalline bit of snow.
A small piece; a bit.

phrasal-verb

Flake out Slang To act in an odd or eccentric manner.
Flake out Slang To fall asleep or collapse from fatigue or exhaustion.
Flake out Slang To lose interest or nerve.

verb-intransitive

To come off in flat thin pieces or layers; chip off.

verb-transitive

To cover, mark, or overlay with or as if with flakes.
To remove a flake or flakes from; chip.

verb

To cover with or as if with .
To form or break into flakes .
To separate into flakes.
To peel in flakes.