Standard Lemma guide
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.
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noun
A black mineral that is a mixed iron and manganese niobate and tantalate, and is the main ore of niobium and tantalum.
Definition source: English Wiktionary via Wiktextract
Topics: chemistry, geography, geology, mineralogy, natural-sciences, physical-sciences
No example sentence was provided for this meaning.
Synonyms: greenlandite
Antonyms: none provided
noun
a black mineral that is an ore of niobium and tantalum
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: niobite
Antonyms: none provided
Broader terms: mineral
History
Etymology tree English columbium Proto-Indo-European *-tósder. Ancient Greek -της (-tēs)der. Ancient Greek -ῑ́της (-ī́tēs)der. Latin -ītēsbor. French -iteder. English -ite English columbite From columbium (“niobium”) + -ite.
Across languages
8 source translations are retained for this English entry.
