microdot
Miniaturized secret message
A microdot is a photograph reduced to the size of a printed period, used historically to transmit secret information.
Spies embedded microdots in ordinary correspondence, invisible to casual inspection but readable under magnification.
The term also refers to tiny tablets of LSD, named for their similar size: He dropped a microdot at the concert.
Covert information gatherer
- clandestineConcealed from authorities
- dead-dropCovert message transfer location
- tradecraftEspionage methods and skills
- CIAU.S. foreign intelligence service
KGB · MI6 · Mossad · operative · agent · intelligence · covert · surveillance
Extremely reduced photograph
- reductionMaking something smaller
- negativeOpposite of affirmative
- emulsionBlended immiscible liquids
- lensLight-focusing curved glass
magnification · archive · document · aperture · miniaturization · reader · viewer · enlarger
Low-pH chemical compound
- blotterPorous paper sheet
- tabProjection for gripping
- doseQuantity of medicine
- windowpaneSheet of glass
psychedelic · hallucinogen · trip · flashback · ergot · lysergic · dropper · gelatin
Extremely small in size
- microscopicToo small for eyes
- minusculeExtremely small in size
- speckMinute visible particle
- pinpointLocate with exactness
pinhead · grain · particle · minute · imperceptible · nanoscale · miniaturized · compact
spy
Covert information gatherer
- clandestineConcealed from authorities
- dead-dropCovert message transfer location
- tradecraftEspionage methods and skills
CIA · KGB · MI6 · Mossad · operative · agent · intelligence · covert · surveillance · smuggling
microphotograph
Extremely reduced photograph
lens · magnification · archive · document · aperture · miniaturization · reader · viewer · enlarger · storage
acid
Low-pH chemical compound
windowpane · psychedelic · hallucinogen · trip · flashback · ergot · lysergic · dropper · gelatin · hit
tiny
Extremely small in size
- microscopicToo small for eyes
- minusculeExtremely small in size
- speckMinute visible particle
pinpoint · pinhead · grain · particle · minute · imperceptible · nanoscale · miniaturized · compact · small
- Spy Fictionspy, secret agent, double agent, MI6, CIA
- secret codescipher, secret code, secret codes, code word, password
- secret messagecode, cipher, invisible ink, cryptogram, Morse code
- dotsperiod, speck, freckle, pixel, decimal point
- LSDacid, blotter, tabs, trip, windowpane
- Steganographyhidden message, invisible ink, digital watermark, hidden text, payload
microdotposter
Displayed printed notice
billboard · broadsheet · mural · wall map · banner
microdotpublic announcement
Official communication to all
skywriting · public notice · open letter · broadcast · announcement