REFRACTOMETER Scrabble 20 Words With Friends 22 Scrabble letter values: R1E1F4R1A1C3T1O1M3E1T1E1R1 = 20 Definition noun measuring instrument for measuring the refractive index of a substance. See all 434 words you can make from REFRACTOMETER → 13-letter words Words starting with R Words ending with R ← Unscramble different letters