Scrabble Dictionary

Check if your word is playable in Scrabble.

Yes, instar is playable

...and is worth 7 points.

Found in the following dictionaries

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

"Instar" Definition

noun

A stage of an insect or other arthropod between molts.
A stage in the life of an arthropod (as an insect) between two successive molts.
An individual in a specified instar.

verb-transitive

To stud with or as if with stars.