noun · 3 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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rō'dēəm
/ˈɹoʊdiəm/
Southern-England:Recorded audio is listed in the source snapshot.
US:Recorded audio is listed in the source snapshot.
General-American:Recorded audio is listed in the source snapshot.
rhymes with -oʊdiəm
CMU ARPABET:R OW1 D IY0 AH0 M
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
A rare, hard, silvery-white, inert metallic chemical element (symbol Rh) with an atomic number of 45.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable, usually
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
A single atom of this element.
Definition source: English Wiktionary via Wiktextract
Usage: countable, usually
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: Rh, atomic number 45
Antonyms: none provided
Broader terms: metallic element, metal
History
Etymology
Borrowed from New Latin rhodium, from Ancient Greek ῥόδον (rhódon, “rose”), because of the colour of its salts' solutions.
Across languages
Translations
75 source translations are retained for this English entry.
