noun: a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
noun: the 15th letter of the Roman alphabet
noun: the blood group whose red cells carry neither the A nor B antigens; "people with type O blood are universal donors"
Length: 1 letters
Scrabble value: 1
Words with Friends value: 1
Literati value: 1
TWL (USA): Found
SOWPODS (UK): Found
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