Isomer

[izoˈmeːɐ̯]

/[izoˈmeːɐ̯]/ noun

The verdict

“Isomer” is uncommon German (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency German
6
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - langlebiger, angeregter Zustand eines Atomkerns (außer dem Grundzustand); wobei langlebig etwa 1 Nanosekunde und länger bedeutet

Corpus desk

Index DE-isomer · Isomer · German

Isomer · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 6 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "I" thin
  • PHOTO-UNK Peer pending

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for Isomer
PropertyValue
HeadwordIsomer
LanguageGerman
Part of speechNoun
IPA[izoˈmeːɐ̯]
Letters6
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Langschwanz-Rang von „Isomer“ im Deutschen

Isomersitzt jenseits der 100.000 häufigsten deutschen Formen, im Schwanz spezialisierten oder seltenen Wortschatzes.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

Isomer is uncommon German outside the top frequency list, classed as anoun, transcribed [izoˈmeːɐ̯]. Rarity is why readers land here mid-draft. 2 senses are on record.

Isomer has no tracked misspelling variants, a sign its spelling follows regular German conventions. It is not paired with a close-neighbour confusable in our dataset, which typically means the spelling is too distinctive to be mistaken for another word.

No documented word history exists for this headword, so spelling patterns must be inferred from the word's phoneme-to-grapheme mapping rather than from a documented borrowing chain. The correct German form is Isomer, spelled I-S-O-M-E-R.

Definition

  1. 1
    langlebiger, angeregter Zustand eines Atomkerns (außer dem Grundzustand); wobei langlebig etwa 1 Nanosekunde und länger bedeutet
  2. 2
    Bezeichnung für organische Verbindungen mit gleicher Bruttoformeln, aber verschiedener Konstitution, aus der sich auch unterschiedliche chemische und physikalische Eigenschaften ergeben

Recorded use

Wiktionary examples

These source excerpts show how Isomer appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Nuklide mit gleich vielen Protonen und Neutronen, aber unterschiedlichem innerem Anregungszustand werden Kernisomere/Isomere genannt. Bezeichnet werden Nuklide mit dem chemischen Elementsymbol und der Massenzahl, wie z.B. das häufigste Kohlenstoffisotop C-12 oder das häufigste Eisenisotop Fe-56 (bei Isomeren noch mit einem Zusatz wie "i").
  2. Eine eindeutige Unterscheidung zwischen den beiden Isomeren Sacculatal (9α H-Form) und Isosacculatal (9β H-Form) wird beim Vergleich der ¹³C-Werte der Methylgruppe C-13 möglich.

Synonyms

Kernisomer

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "Isomer"?
"Isomer" is spelled I-S-O-M-E-R. The IPA pronunciation is [izoˈmeːɐ̯].
What does "Isomer" mean?
As a noun, "Isomer" means: langlebiger, angeregter Zustand eines Atomkerns (außer dem Grundzustand); wobei langlebig etwa 1 Nanosekunde und länger bedeutet
How do you pronounce "Isomer"?
The IPA (International Phonetic Alphabet) transcription for "Isomer" is [izoˈmeːɐ̯]. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "Isomer" come from?
"Isomer" is a German word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
Is PlainSpell free to use?
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.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list