noun
Meaning 1
Any of a range of yellowish-brown to green minerals that are mixed phosphates of (primarily) calcium and thorium, associated with uraniferous deposits.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: chemistry, geography, geology, mineralogy, natural-sciences, physical-sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided