Is barbel a word in the Scrabble Dictionary

Yes, barbel 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)

"Barbel" Definition

noun

Any of several Old World freshwater fish of the genus Barbus, especially B. barbus, having four barbels on its upper jaw.
One of the slender, whiskerlike tactile organs extending from the head of certain fishes, such as catfishes. Also called barb1.
A European freshwater cyprinid fish () with four on its upper jaw.
Any of various closely related fishes.
A slender tactile process on the lips of certain fishes (as catfishes).