invisible ink.
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Invisible ink — Invisible ink, also known as security ink, is a substance used for writing, which is invisible either on application or soon thereafter, and which later on can be made visible by some means. Invisible ink is one form of steganography, and it has… … Wikipedia
invisible ink — in*vis i*ble ink , n. A fluid that has no color in the visible spectrum, but may be detected under certain conditions, as under ultraviolet light. It may be used to write notes not readable under normal light. [PJC] … The Collaborative International Dictionary of English
invisible ink — n. a colorless ink that cannot be seen on paper until it is treated with heat, vapor, or a chemical * * * … Universalium
invisible ink — n. a colorless ink that cannot be seen on paper until it is treated with heat, vapor, or a chemical … English World dictionary
invisible ink — How do you know when you ve run out of invisible ink? … English expressions
invisible ink — ink which cannot be seen until treated with heat or chemicals … English contemporary dictionary
invisible ink — noun An ink, invisible on application or soon thereafter, that can later be rendered visible by some process, such as exposing it to heat … Wiktionary
invisible ink — invis′ible ink′ n. chem. a writing fluid that is invisible until treated, as by heat or chemicals • Etymology: 1675–85 … From formal English to slang
invisible ink — in.visible ink n [U] ink that cannot be seen on paper until it is heated, treated with chemicals etc, and is used for writing secret messages … Dictionary of contemporary English
invisible ink — noun a type of ink used to produce writing that cannot be seen until the paper is heated or otherwise treated … English new terms dictionary
