irradiation

/ɪˌɹeɪdiˈeɪʃən/

//ɪˌɹeɪdiˈeɪʃən// noun

By · According to Wiktionary data (CC BY-SA) ·

"irradiation" is a 11-letter English headword indexed on PlainSpell.

The verdict

“irradiation” has 14 generated spelling variants in the English index at frequency #25,804. The variants make it a useful spelling check.

#25,804
frequency rank, English
17,902
“I” headwords
14
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - An act of irradiating, or state of being irradiated.

Key facts for irradiation
PropertyValue
Headwordirradiation
LanguageEnglish
Part of speechNoun
IPA/ɪˌɹeɪdiˈeɪʃən/
Letters11
Frequency rank#25,804
Misspellings tracked14
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “irradiation” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). irradiation lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 14 spelling variants around irradiation (IPA /ɪˌɹeɪdiˈeɪʃən/), anoun. Corpus frequency is #25,804 among 17,902 “I” headwords. Wiktionary lists 5 senses, so context still picks the gloss.

Our generated misspelling index lists 14 likely wrong-spelling variants for irradiation, with forms such as "iradiation", "irardiation", and "irradaition". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. No confusable counterpart is on file for this word, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: From Middle French irradiacion, from Latin irradiatio. Morphologically irradiate + -ion. The correct English form is irradiation, spelled I-R-R-A-D-I-A-T-I-O-N.

Definition

  1. 1
    An act of irradiating, or state of being irradiated.
  2. 2
    An act of irradiating, or state of being irradiated.
  3. 3
    illumination; irradiance; brilliance.
  4. 4
    mental light or illumination.
  5. 5
    The apparent enlargement of a bright object seen upon a dark ground, due to the fact that the portions of the retina around the image are stimulated by the intense light; as when a dark spot on a white ground appears smaller, or a white spot on a dark ground larger, than it really is, especially when a little out of focus.

Etymology

From Middle French irradiacion, from Latin irradiatio. Morphologically irradiate + -ion.

This word in other languages

irradiation(Français)Bestrahlung(Deutsch)irradiação(Português)

Common misspellings

Also misspelled as: iradiation,irardiation,irradaition,irraddiation,irradiaiton,irradiasion,irradiatino,irradiationn,irradiatoin,irradiattion,irraditaion,irraidation,irrdaiation,riradiation

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of irradiation - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.

iradiation1irardiation2irradaition2irraddiation1irradiaiton2irradiasion1irradiatino2irradiationn1
Edit distance from "irradiation"

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "irradiation"?
"irradiation" is spelled I-R-R-A-D-I-A-T-I-O-N. The IPA pronunciation is /ɪˌɹeɪdiˈeɪʃən/.
What does "irradiation" mean?
As a noun, "irradiation" means: An act of irradiating, or state of being irradiated.
What are common misspellings of "irradiation"?
Common misspellings include "iradiation", "irardiation", "irradaition", "irraddiation", "irradiaiton". The correct spelling is "irradiation".
How do you pronounce "irradiation"?
The IPA (International Phonetic Alphabet) transcription for "irradiation" is /ɪˌɹeɪdiˈeɪʃən/. 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 "irradiation"?
From Middle French irradiacion, from Latin irradiatio. Morphologically irradiate + -ion. See the full etymology section above for more details.
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.

Using “irradiation”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is I-R-R-A-D-I-A-T-I-O-N - every other letter order is a misspelling in standard orthography.
  • Say it as /ɪˌɹeɪdiˈeɪʃən/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more English words and confusable pairs in the same reference. English words

Same frequency band

Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list