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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples 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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012