noun
Usage: usually capitalized C
Etymology: after Sir Wm. Crookes
: one of several types of glass designed to diminish the transmission of ultraviolet rays
noun
Usage: usually capitalized C
Etymology: after Sir Wm. Crookes
: one of several types of glass designed to diminish the transmission of ultraviolet rays
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012