radiopacity

noun

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

The verdict

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

Unranked
below top-frequency English
11
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The state or degree of being opaque to X-rays.

Key facts for radiopacity
PropertyValue
Headwordradiopacity
LanguageEnglish
Part of speechNoun
Letters11
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “radiopacity” sits in English frequency

radiopacity falls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

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

Rare enough to double-check

radiopacity is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "The state or degree of being opaque to X-rays.".

radiopacity has no tracked misspelling variants, typically a sign the spelling maps closely to how the word sounds. This headword has no recorded confusable partner, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.

Etymologically, the entry records: From radio- + opacity. The correct English form is radiopacity, spelled R-A-D-I-O-P-A-C-I-T-Y.

Definition

  1. 1
    The state or degree of being opaque to X-rays.

Etymology

From radio- + opacity.

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 "radiopacity"?
"radiopacity" is spelled R-A-D-I-O-P-A-C-I-T-Y.
What does "radiopacity" mean?
As a noun, "radiopacity" means: The state or degree of being opaque to X-rays.
What is the origin of the word "radiopacity"?
From radio- + opacity. 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 “radiopacity”

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

  • The one correct English spelling is R-A-D-I-O-P-A-C-I-T-Y - every other letter order is a misspelling in standard orthography.
  • Browse more English words and confusable pairs in the same reference. English words
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