Meaning & use
molecule
The smallest unit of a substance that still has all its chemical properties, made of two or more bonded atoms.
See it in a sentence
A water molecule consists of two hydrogen atoms bonded to one oxygen atom.
Scientists studied how the new molecule interacts with cells in the human body.
A note on using this word
Molecule refers to bonded atoms of a compound or element; a single atom alone is not usually called a molecule.
Words with a similar meaning
This term is best learned through its definition and examples.
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Make it your own
Write a sentence using “molecule”, then compare your use with the examples above.
Your draft stays on this page and is not sent anywhere.