OMMATIDIUM /ɑməˈtɪdɪəm/ Scrabble 17 Words With Friends 21 Scrabble letter values: O1M3M3A1T1I1D2I1U1M3 = 17 Definition noun any of the numerous small cone-shaped eyes that make up the compound eyes of some arthropods. See all 105 words you can make from OMMATIDIUM → 10-letter words Words starting with O Words ending with M ← Unscramble different letters