microdot

[ mahy-kruh-dot ]
/ ˈmaɪ krəˌdɒt /

noun

a photograph reduced to the size of a printed period, used especially to transmit messages, photographs, drawings, etc.

verb (used with object), mi·cro·dot·ted, mi·cro·dot·ting.

to make a microdot of.

Origin of microdot

First recorded in 1945–50; micro- + dot1

Example sentences from the Web for microdot

British Dictionary definitions for microdot

microdot
/ (ˈmaɪkrəʊˌdɒt) /

noun

a microcopy about the size of a pinhead, used esp in espionage
a tiny tablet containing LSD