E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Rem Acu.
You have hit the mark; you have hit the nail on the head. Rem acu tetigisti (Plautus). A phrase in archery, meaning, You have hit the white, or the bull’s-eye.
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“‘Rem acu once again,’ said Sir Piercie.”—The Monastery, chap. xvi.
