pleochroism
noun
pleochroism is spelled P-L-E-O-C-H-R-O-I-S-M: 11 letters. It appears about once in every 95 million words in written English, the 313,259th most frequent word form (wordfreq, 2021 data). As a noun, pleochroism means “The optical phenomenon in some coloured, transparent crystals (such as tourmaline and opal) in which the colour changes when viewed from different…” (English Wiktionary, September 2026). The plural of pleochroism is pleochroisms.
How many letters and syllables are in pleochroism?
| Letters | 11: P-L-E-O-C-H-R-O-I-S-M |
|---|---|
| In writing | about once in every 95 million words; the 313,259th 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 pleochroism?
Pleochroism appears about once in every 95 million words in written English, the 313,259th 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 pleochroism
- pleochroisms plural
- pleochromism
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does pleochroism mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
The optical phenomenon in some coloured, transparent crystals (such as tourmaline and opal) in which the colour changes when viewed from different directions.
- 2
The presence of various colours in the cell wall.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Pleochroism in Spanish, French, German and Portuguese
In the sense optical phenomenon:
| Language | Words |
|---|---|
| Spanish | pleocroísmo |
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.