- an oxide containing one oxygen atom in each molecule.
- an oxide that contains one oxygen atom per moleculecarbon monoxide, CO
n.“oxide with one oxygen atom in each molecule,” 1869, from mono- + oxide. n.
- An oxide with each molecule containing one oxygen atom.
- A compound consisting of two elements, one of which is a single oxygen atom. Carbon monoxide, for example, contains a carbon atom bound to a single oxygen atom.