| 单词 | columbium |
| 释义 | Columbian /kə-lumˈbi-ən/adjective (poetic)Of or relating to the United States, American noun (printing)A size of type between English and Great Primer, approx 16-point ORIGIN: Christopher Columbus, discoverer of America columˈbate noun Niobate columˈbic adjective Niobic columbˈite noun A mineral, niobate and tantalate of iron and manganese columˈbium noun The former name for niobium Columbus Day noun 12 October, a holiday in the USA niobium /nī-ōˈbi-əm/nounA metallic element (symbol Nb; atomic no 41) discovered in the mineral tantalite and used in certain alloys (formerly called columbium) ORIGIN: Niobe, from the connection with tantalite nīˈobate noun A salt of niobic acid nioˈbic adjective Containing niobium in its pentavalent form (niobic acid hydrated niobium pentoxide) niˈobite noun same as columbite (see under Columbian) nīoˈbous adjective Containing niobium with a valency of less than five |
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