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atom

Definition, pronunciation, etymology, and usage for the English word. Free spelling reference powered by Wiktionary.

Letters

4 characters

Language

English

word origin

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Detailed reference entry for the English word "atom", 4-letters, with pronunciation in International Phonetic Alphabet notation, etymology traced through Germanic and Romance roots where applicable, common misspelling variants catalogued from Hunspell error dictionaries, and usage frequency ranked against the top 100,000 English words in the Wordfreq corpus. PlainSpell covers English, Spanish, Portuguese, French, and German spelling with confusable-pair detection that highlights visually and phonetically similar words. This entry for "atom" includes synonyms, antonyms, homophones, and cross-language translation pointers sourced from Wiktionary via the kaikki.org extract. Whether you are verifying the correct spelling of "atom" for academic writing, checking homophone confusion, or exploring etymological origins, this page provides a citation-backed, free reference that requires no sign-up.

atom is aEnglishnoun. It means: The smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons. Pronounced /ˈætəm/. Often confused with ATP and att.

Key facts for atom
PropertyValue
Headwordatom
LanguageEnglish
Part of speechNoun
IPA/ˈætəm/
Letters4
Frequency rank#10,813
Misspellings tracked5
Confusable pairs20
SourceWiktionary (kaikki.org)

Frequency rank visualization

Position of atom in English word frequency (lower rank = more common)

Source: Wordfreq corpus

Spelling & Dictionary Insight

The English entry for atom is 4 letters long, classified as anoun, and transcribed in the International Phonetic Alphabet as /ˈætəm/. Corpus data places it at rank #10,813 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it.Wiktionary records 12 distinct senses for this headword, so context determines which meaning a reader should apply.

Our Hunspell-derived misspelling index lists 5 documented wrong-spelling variants for atom, with forms such as "aotm", "atmo", and "atomm". Each variant represents a distinct typo pattern that appears often enough in corpora to be worth flagging, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution.It also participates in 20 confusable-pair relationships, "ATP", "att", "ATV", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From Middle English attome, from Middle French athome, from Latin atomus (“smallest particle”), from Ancient Greek ἄτομος (átomos, “indivisible”), from ἀ- (a-, “not”) + τέμνω (témnō, “to cut”, o-grade in τομ-) + -ος (-os). Atoms are so named because they we… Root origin matters for spelling because borrowed morphemes (Greek, Latin, Old French, Old English) carry their source-language orthographic conventions into modern English, which is why historical etymology is often the cleanest predictor of whether a cluster like "-ough", "-eau", or "-tion" will appear. For readers arriving here from a spelling check, the authoritative guidance is: the correct English form is atom, spelled A-T-O-M, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.

Definition

  1. 1
    The smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
  2. 2
    A hypothetical particle posited by Greek philosophers as an ultimate and indivisible component of matter.
  3. 3
    The smallest, indivisible constituent part or unit of something.
  4. 4
    In logical atomism, a fundamental fact that cannot be further broken down.
  5. 5
    The smallest medieval unit of time, equal to fifteen ninety-fourths of a second.
  6. 6
    A mote of dust in a sunbeam.
  7. 7
    A very small amount; a whit.
  8. 8
    An individual number or symbol, as opposed to a list; a scalar value.
  9. 9
    An integer representing a particular string.
  10. 10
    A non-zero member of a partially ordered set that has only zero below it (assuming that the poset has a least element, its "zero").
  11. 11
    An element of a set that is not itself a set; an urelement.
  12. 12
    An age group division in hockey for nine- to eleven-year-olds.

Etymology

From Middle English attome, from Middle French athome, from Latin atomus (“smallest particle”), from Ancient Greek ἄτομος (átomos, “indivisible”), from ἀ- (a-, “not”) + τέμνω (témnō, “to cut”, o-grade in τομ-) + -ος (-os). Atoms are so named because they were historically thought up as to be the smallest unit of matter, and thus indivisible. Doublet of atomus.

This word in other languages

Common misspellings

Also misspelled as: aotm,atmo,atomm,attom,taom

Misspelling Pattern Breakdown

Relative frequency of common misspelling types for atom

Misspelling Variants of "atom"

aotm4atmo4atomm5attom5taom4
Misspelling Variants of "atom"

Frequency rank: #10,813 in English

Frequently Asked Questions

How do you spell "atom"?
"atom" is spelled A-T-O-M. The IPA pronunciation is /ˈætəm/.
What does "atom" mean?
As a noun, "atom" means: The smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
What words are commonly confused with "atom"?
"atom" is commonly confused with "ATP", "att", "ATV". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "atom"?
The IPA (International Phonetic Alphabet) transcription for "atom" is /ˈætəm/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "atom"?
From Middle English attome, from Middle French athome, from Latin atomus (“smallest particle”), from Ancient Greek ἄτομος (átomos, “indivisible”), from ἀ- (a-, “not”) + τέμνω (témnō, “to cut”, o-grade in τομ-) + -ος (-os). Atoms are so named becau... See the full etymology section above for more details.
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Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Nearby English words

Other entries that begin with the letter A in our English index:

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Data Source: Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Frequency data from Wordfreq. Misspellings derived from Hunspell dictionaries.