catadioptre
French, noun/ka.ta.djɔptʁ/
catadioptre is spelled C-A-T-A-D-I-O-P-T-R-E (11 letters) and appears about once in every 87 million words in written French, the 291,657th most frequent French word form (wordfreq, 2021 data). Catadioptre is a French masculine noun meaning “reflector, retroreflector” (English Wiktionary, September 2026). The French Wiktionary (Wiktionnaire) defines it as “Système optique servant à réfléchir un faisceau lumineux du visible (ou du proche infrarouge) dans la…”.
What does catadioptre mean in English?
noun
- 1
masculinereflector, retroreflector
Source: English Wiktionary, French section, dump of September 2, 2026 (CC BY-SA 4.0).
How French dictionaries define it
noun: 1. Système optique servant à réfléchir un faisceau lumineux du visible (ou du proche infrarouge) dans la direction du flux lumineux entrant, et ce quel que soit l’angle d’incidence.
The definition in the French Wiktionary (Wiktionnaire), in French.
Source: French Wiktionary (Wiktionnaire), dump of September 1, 2026 (CC BY-SA 4.0), through kaikki.org.
Forms of catadioptre
- catadioptres plural
Source: English Wiktionary and French Wiktionary (Wiktionnaire) (dumps of September 2, 2026 and September 1, 2026).
How do you pronounce catadioptre?
- /ka.ta.djɔptʁ/
- \ka.ta.djɔptʁ\
Sources: English Wiktionary, French Wiktionary (Wiktionnaire) (dumps of September 2, 2026 and September 1, 2026); recordings from Wikimedia Commons.
How common is catadioptre in French?
catadioptre appears about once in every 87 million words in written French.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).