isopyre [ahy-suh-pahyuh r] Word Origin noun Mineralogy.
- an impure variety of opal, containing alumina, lime, and iron sesquioxide.
Origin of isopyre 1820–30; iso- + Greek pŷr fire
isopyre [ahy-suh-pahyuh r] Word Origin noun Mineralogy.
Origin of isopyre 1820–30; iso- + Greek pŷr fire