Definition of microdot
: a photographic reproduction of printed matter reduced to the size of a dot for ease or security of transmittal
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Computer security experts say there's also a visible trail on everything printed nowadays, that color printers leave microdots.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'microdot.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of microdot
1946
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