hélio-
French, prefix\e.ljo\
hélio- is spelled H-É-L-I-O (5 letters) and appears about once in every 16 million words in written French, the 129,327th most frequent French word form (wordfreq, 2021 data). Hélio- is a French prefix meaning “helio-” (English Wiktionary, September 2026). The French Wiktionary (Wiktionnaire) defines it as “Relatif au Soleil, à un soleil”.
What does hélio- mean in English?
prefix
- 1
helio-
Source: English Wiktionary, French section, dump of September 2, 2026 (CC BY-SA 4.0).
How French dictionaries define it
prefix: 1. Relatif au Soleil, à un soleil.
noun: 1. Héliogravure, photogravure industrielle en creux par exposition d’une surface photosensible à une lumière intense.
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 hélio-
- hélios plural
Source: English Wiktionary and French Wiktionary (Wiktionnaire) (dumps of September 2, 2026 and September 1, 2026).
How do you pronounce hélio-?
- \e.ljo\
Sources: English Wiktionary, French Wiktionary (Wiktionnaire) (dumps of September 2, 2026 and September 1, 2026); recordings from Wikimedia Commons.
English words that translate to hélio-
Source: the translation tables of the English Wiktionary, dump of September 2, 2026.
How common is hélio- in French?
hélio- appears about once in every 16 million words in written French.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).