Meaning & Definition of word "Atom"

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    Atom

    /ˈæt.əm/

    noun:

    • 1. The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.
      • Example: An atom of hydrogen is the simplest and lightest atom.
    • 2. A minute quantity of a substance; a tiny amount.
      • Example: Not a single atom of evidence was found to support the claims.
    • 3. In physics, an atom is described as the basic building block of matter.
      • Example: All matter is made up of atoms, which combine to form molecules.

    Etymology

    From Greek 'atomos' meaning 'indivisible'.

    Common Phrases and Expressions

    split atom:

    To make a significant change or innovation.

    at the atomic level:

    Referring to the fundamental structure of matter.

    to the last atom:

    Completely or thoroughly.

    Related Words

    molecule:

    A group of atoms bonded together.

    nucleus:

    The positively charged center of an atom.

    electron:

    A subatomic particle with a negative charge.

    Slang Meanings of atom

    Meaning: A small or insignificant person.

    Example Sentence: He's just an atom in the big world of finance.

    Meaning: Used to refer to someone very meticulous or detail-oriented.

    Example Sentence: She’s an atom when it comes to planning events.