Scrabble Dictionary

Check if your word is playable in Scrabble.

Yes, nastic is playable

...and is worth 10 points.

Found in the following dictionaries

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

"Nastic" Definition

adjective

Of, relating to, or characterized by the tendency in plant parts to move in a direction determined by an internal stimulus, as an increased rate of cellular growth on one surface or side of the plant part.
Of, relating to, or constituting a movement of a plant part caused by disproportionate growth or increase of turgor in one surface.