— thoric /thawr"ik, thor"-/ , adj.
/thawr"ee euhm, thohr"-/ , n. Chem.
a grayish-white, lustrous, somewhat ductile and malleable, radioactive metallic element present in monazite: used as a source of nuclear energy, as a coating on sun-lamp and vacuum-tube filament coatings, and in alloys. Symbol: Th; at. wt.: 232.038; at. no.: 90; sp. gr.: 11.7. Cf. thoria .
[ ]