ˈäptəˌgram noun
Etymology: International Scientific Vocabulary opto- + -gram, originally formed as German optogramm
: an image of an external object fixed on the retina by the photochemical action of light on the visual purple
ˈäptəˌgram noun
Etymology: International Scientific Vocabulary opto- + -gram, originally formed as German optogramm
: an image of an external object fixed on the retina by the photochemical action of light on the visual purple
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012