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1. columbite
noun.
A
black
mineral
that
is
an
ore
of
niobium
and
tantalum.
Synonyms
niobium
atomic number 73
Ta
atomic number 41
niobite
mineral
Nb
tantalum
Antonyms
organic
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2. columbite-tantalite
noun.
A
valuable
black
mineral
combining
niobite
and
tantalite;
used
in
cell
phones
and
computer
chips.
Synonyms
coltan
mineral
Antonyms
organic
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creative
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dragoon
white-person
gujarati
define
diversity
some
good
for-the-first-time
out-of-the-box thinking
delimitation
filipino
luddite
self-winding
happy
specialize
help
availability
mental-health
homophobic
know-it-all
important
create
technology
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