monoxide
Noun: A chemical compound that is an oxide containing exactly one atom of oxygen in each of its molecules.
"Monoxide" is a scientific term used primarily in chemistry to classify and name specific compounds. It is almost always used in combination with the name of another element to form the compound's full name (e.g., carbon monoxide). It is rarely used in isolation in everyday language.
- Carbon monoxide is a dangerous, odorless gas produced by incomplete combustion.
- The chemical formula for carbon monoxide is CO.
- Scientists are studying the atmospheric levels of various monoxide compounds.
- In Chemical Nomenclature: The suffix "-monoxide" systematically indicates a 1:1 ratio of another element to oxygen in a binary compound. For example, dinitrogen monoxide (N₂O) contains two nitrogen atoms for every one oxygen atom, but each molecule still contains only one oxygen atom, justifying the "monoxide" name.
- In Public Safety Contexts: The term is most commonly encountered in public health warnings about "carbon monoxide poisoning" or the need for "carbon monoxide detectors."
- Dioxide (n): An oxide containing two atoms of oxygen in each molecule (e.g., carbon dioxide, CO₂).
- Trioxide (n): An oxide containing three atoms of oxygen in each molecule (e.g., sulfur trioxide, SO₃).
- Oxide (n): A broader term for any binary compound of oxygen with another element.
There is no direct single-word synonym. The concept is described as "an oxide with a single oxygen atom."
- Carbon monoxide (CO): The most commonly referenced monoxide, a toxic gas.
- Nitric oxide (NO): A signaling molecule in the body and an air pollutant.
- Silicon monoxide (SiO): A chemical compound used in some industrial applications.
The word "monoxide" itself does not describe properties like toxicity or reactivity; these properties depend entirely on the other element it is bonded with (e.g., carbon monoxide is toxic, while nitric oxide has biological functions). Its sole defining characteristic is its atomic composition: one oxygen atom per molecule.
- an oxide containing just one atom of oxygen in the molecule