monoxide

noun Chemistry.

1. an oxide containing one oxygen atom in each molecule.

noun

1. 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.

1. An oxide with each molecule containing one oxygen atom.

1. 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.