Recipe (3 syl.), Receipt.
Recĭpe is Latin for take, and contracted into R is used in doctor’s prescriptions. The dash through the R is an abbreviated form of ♃, the symbol of Jupiter, and R means Recĭpe, deo volente.
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Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.