sympathetic ink en · NOUN
Meanings
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(countable, dated, uncountable) Invisible ink.
"I've got it! Sympathetic ink!" "You think so?" "Worth trying anyhow. Heat usually does the trick. Get some sticks. Well make a fire."
1922, Agatha Christie, The Secret Adversary:
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| sympathetic inks | Number=Plur | lexicographic |