繊維光学: fiber optics (US), fibre optics (UK)

鉱物学: mineralogy

酵素学: enzymology

optics (physics of light and vision)

scholarliness, a love of learning

high-priced, expensive

a large amount of money

photochemistry

蛍(ほたる)の光(ひかり)窓(まど)の雪(ゆき) (hotaru no hikari mado no yuki, “firefly's dim light, snow reflected on the window → diligent study”)

a placename, such as that of a city in Yamaguchi Prefecture / one of the bullet train services running on the 東海道 (Tōkaido) or 山陽 (San'yō) shinkansen / a surname / a female given name