phototoxicity
noun
phototoxicity is spelled P-H-O-T-O-T-O-X-I-C-I-T-Y: 13 letters. It appears about once in every 66 million words in written English, the 255,765th most frequent word form (wordfreq, 2021 data). As a noun, phototoxicity means “Any adverse effect due to exposure to light, especially such effects on the skin” (English Wiktionary, September 2026). The plural of phototoxicity is phototoxicities.
How many letters and syllables are in phototoxicity?
| Letters | 13: P-H-O-T-O-T-O-X-I-C-I-T-Y |
|---|---|
| In writing | about once in every 66 million words; the 255,765th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is phototoxicity?
Phototoxicity appears about once in every 66 million words in written English, the 255,765th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Forms of phototoxicity
- phototoxicities plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does phototoxicity mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
Any adverse effect due to exposure to light, especially such effects on the skin
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Phototoxicity in Spanish, French, German and Portuguese
In the sense adverse effect:
| Language | Words |
|---|---|
| Portuguese | fototoxicidade |
| Spanish | fototoxicidad |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.