hor. som. WORD ORIGIN (in prescriptions) at bedtime. Liberaldictionary.com
Origin of hor. som. From the Latin word hōrā somnī at the hour of sleep Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019 hor. som. in Medicine hor. som. abbr. hora somni (before sleep, at bedtime) The American Heritage® Stedman’s Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.