As nouns the difference between terms and heliophyllite
is that terms is while heliophyllite is (mineral) an orthorhombic mineral containing arsenic, chlorine, lead, and oxygen.
terms
English
Noun
(head)
Statistics
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heliophyllite
English
Noun
(mineral) An orthorhombic mineral containing arsenic, chlorine, lead, and oxygen.
References
* Heliophyllite in the Mineralogy Database: [http://webmineral.com/data/Heliophyllite.shtml]