Is rattan a word in the Scrabble Dictionary

Yes, rattan is playable

...and is worth 7 points.

Found in the following dictionaries

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

"Rattan" Definition

noun

A switch or cane made from these palms.
Any of various climbing palms of the genera Calamus, Daemonorops, or Plectomia of tropical Asia, having long, tough, slender stems.
The stems of any of these palms, used to make wickerwork, canes, and furniture.
Work made of the stems of these palms.
A rattan cane or switch.