invisible ink (English, noun)
expansion: invisible ink (countable and uncountable, plural invisible inks)
Senses:
glosses: An ink, invisible on application or soon thereafter, that can later be rendered visible by some process, such as exposing it to heat.
tags: countable
uncountable
glosses: An ink used in pranks that is visible at first but soon disappears.
tags: countable
uncountable
Forms:
form: invisible inks
tags: plural