niobium

n. (Nb) soft ductile metallic element used in steel alloys (Chemistry)

Niobium (IPA: ), or columbium (IPA: ) is a chemical element that has the symbol Nb and atomic number 41. A rare, soft, gray, ductile transition metal, niobium is found in pyrochlore and columbite. It was first discovered in the latter mineral and so was initially named columbium; now that mineral is also called "niobite". Niobium is used in special steel alloys as well as in welding, nuclear industries, electronics, optics and jewelry.
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Noun
1. a soft gray ductile metallic element used in alloys; occurs in niobite; formerly called columbium
(synonym) Nb, atomic number 41
(hypernym) metallic element, metal
(hyponym) columbium
(substance-holonym) niobite, columbite

n. niobium, soft ductile metallic element used in steel alloys (Chemistry)

n. niobium, soft ductile metallic element used in steel alloys (Chemistry)