- pronunciation:
- ma
l
kyul
- features:
- Word History, Word Explorer, Word Parts
| part of speech: |
noun |
| definition: |
the smallest unit of a substance that has all the properties of that substance. A molecule is made up of a single atom or group of atoms.
Each molecule of water has one hydrogen and two oxygen atoms. |
Molecule comes from
moles, a Latin word that means "mass." "Molecule" is a French word for "tiny mass."