Qv Definition
abbreviation
(in prescriptions) As much as you wish.
Wiktionary
Origin of Qv
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From Latin quantum (“as much as") + vÄ«s (“you want, you wish"), the second person singular active indicative form of volo (“I want, I wish").
From Wiktionary
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From Latin quod vidÄ“ (literally “which see"), from quod, the neuter of quÄ« (“what") + vidÄ“ the imperative mood of videō (“I see").
From Wiktionary