Is endive a word in the Scrabble Dictionary

Yes, endive is playable

...and is worth 12 points.

Found in the following dictionaries

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OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)

"Endive" Definition

noun

A variety of the common chicory Cichorium intybus cultivated to produce a narrow, pointed, blanched cluster of leaves used in salads. Also called Belgian endive, witloof.
An Indian plant (Cichorium endivia) cultivated for its crown of crisp succulent leaves used in salads. Also called frisée.
Escarole.
One having slightly bitter broad flat leaves used especially cooked as a vegetable .
One having slightly bitter curly usually dissected leaves used especially in salads.