The Quantum Leap:
defined as Vis, Sufficit, Placet
Quantum Vis, Q.V. = the power leap: to leap with force, strength, and influence
Quantum Sufficit, Q.S. = the measured leap: precisely the leap that is sufficient, no more and no less
Quantum Placet, Q.P. = the ardent leap: leaping as pleasure; that leap which feels pleasurable to the leaper
In the macro-world, these abbreviations are mundane and medicinal, appended to prescriptions for the purpose of guiding the chymist. Definitions below.
DICTIONARY of PHRASE and FABLE*, giving the Derivation, Source, or Origin of Common Phrases, Allusions, and Words that have a Tale to Tell. By the Rev. E. COBHAM BREWER, LL.D.1872.
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