Gadit

atom

Definitions (3)
1nounThe tiniest piece of a chemical element that still stays that element.
Every atom of gold has the same number of protons.
A single atom is far too small to see with your eyes.
Atoms join together to make molecules like water.
2noun(chemistry) The smallest unit of an element, made up of protons, neutrons, and electrons.
In science class, we learned that an oxygen atom has eight protons.
A carbon atom can bond with other atoms to form many different substances.
The electrons move around the center of the atom.
3nounA very small amount of something.
There wasn't an atom of truth in the rumor.
He didn't show an atom of fear.
She felt not an atom of doubt before the race.
Word Origin
Language
Greek
Original word
atomos
Word parts
a- (not) + tomos (cut)
Originally meant
something that cannot be cut into smaller pieces
Background
The word came from ancient Greek philosophy, where thinkers used it for the smallest possible piece of matter. Much later, modern science kept the old name even after discovering that atoms themselves contain smaller parts.
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