光こう明めい石せきMeaningsNoun1. kōmeiseki; kōmei stone; slightly radioactive stone used in onsens, traditional medicine, etc.Other readings光こう明みょう石せきKanji used光ray明bright石stoneComposed of光こう明めいbright light; hope; bright future; light emanating from a buddha or bodhisattva, symbolizing their wisdom and compassionNoun石せきcounter for jewels in a watch; counter for transistors, diodes, etc. in an electronic productCounter