noun
Usage: usually capitalized M
: one of two or more radially slit and concentric disks of different colors that may be overlapped by adjustable amounts to yield the average color when rotated rapidly
noun
Usage: usually capitalized M
: one of two or more radially slit and concentric disks of different colors that may be overlapped by adjustable amounts to yield the average color when rotated rapidly
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012