Reference meaning
O
Last updated
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
Related source terms
oxygenatomic number 8
Other meanings
2. noun
the 15th letter of the Roman alphabet
3. noun
the blood group whose red cells carry neither the A nor B antigens
Source and scope
This definition is reproduced from Princeton WordNet 3.0, sense 14648100-n, under the WordNet 3.0 License. It has not yet received VocabularyBase editorial review. Read the source and license details.