oxygen

Definition

• n. 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

Word forms

Plural

oxygens

Example sentences

1. n.

   Plants produce oxygen during photosynthesis, which is essential for human life.

2. 化

   Oxygen gas is represented as O2, meaning each molecule contains two oxygen atoms.