Rx

noun
\ˌär-ˈeks \

Definition of Rx 

Did You Know?

The "R" in "Rx" stands for the Latin word recipe, meaning "take," and the first doctor to use "Rx" used it as a verb with the same meaning, "Rx two aspirin" being equivalent to today's "Take two aspirin." (The word recipe had had the same function from the 13th through the 17th centuries.) Those two letters were a 19th-century take on a 16th-century symbol, the letter R with a line through its slanted leg-the line signaling that the "R" is functioning as an abbreviation. It wasn't till the early 20th century that "Rx" came to be used as the noun we know today. As for the noun "recipe," it followed the same trajectory, referring to a medical prescription for about 100 years before it developed its connection with cooking in the early 17th century.

First Known Use of Rx

1926, in the meaning defined above

History and Etymology for Rx

alteration of ℞, symbol used at the beginning of a prescription, abbreviation for Latin recipe, literally, take — more at recipe

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Dictionary Entries near Rx

Rwala

Rwanda

rwy

Rx

-ry

rya

ryal

Statistics for Rx

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Time Traveler for Rx

The first known use of Rx was in 1926

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More Definitions for Rx

Rx

noun

English Language Learners Definition of Rx

: a doctor's prescription

Rx

noun
\ˈär-ˈeks \

Medical Definition of Rx 

: a medical prescription

More from Merriam-Webster on Rx

Rhyming Dictionary: Words that rhyme with Rx

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