optogram

optogram is defined in Webster's Unabridged Dictionary (1913) with 1 sense. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.An image of external objects fixed on the retina by the photochemical action of light on the visual purple. See Optography.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

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Definition-first questions whose answer is optogram.

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