Meaning of polymignyte | Babel Free
Definitions
A mineral consisting of columbate (a compound containing the element niobium) and oxides of the cerium group of elements with iron and calcium.
countable, uncountable
CEFR level
C1
Advanced
This word is part of the CEFR C1 vocabulary — advanced level.
This word is part of the CEFR C1 vocabulary — advanced level.