pyrognomic
adjective
py·ro·gno·mic
¦pīrə¦nōmik,
-rəg¦n-,
-näm-
: readily becoming incandescent when heated due to rapid exothermic recrystallization —used of metamict minerals (as gadolinite)
Word History
Etymology
pyr- + Greek gnōmon knower, discerner, index + English -ic