phenomenonWaningCosmosThe moon’s shrinking lit portion from full toward new. Not waxing, and not crescent alone.Waning is used in Medicine.Pliny’s Natural History treats the waning moon among phase speech for timing. A named waning lessening in that encyclopedia, not waxing and not new-moon.from Pliny the Elder · Natural History, c. 77 CEused in · sourced · documentedsourcesNatural History · Pliny the ElderPliny, Naturalis Historia.