HS

(Latin) before sleep, at bedtime (term often used in Medicine and pharmacy)

HS or Hs can stand for:Harmonized System of tariff nomenclaturehassium, the chemical element head shot in photographyheadshot in gamingHeavenly Sword, a game for the PlayStation 3Helsingin Sanomat, a newspaper in Finlandhidradenitis suppurativa, a skin condition affecting apocrine sweat glands and hair follicleshigh school (secondary education)High Society, a German warez and art groupHigher Secondary Examination in West Bengalthe Higman–Sims group in mathematicsHistorische Sprachforschung, a journal of historical linguisticsHousatonic Southern or Hartford and Slocomb Railroad (after the mark was abandoned by Housatonic Southern) – hydrogen sulphide, a chemical compoundRJA&HS, Royal Jersey Agricultural and Horticultural Society
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HS or Hs can stand for:The chemical element hassiumHeadshot; a video game termHigh schoolThe disease Hidradenitis suppurativaStatic Head when analyzing pump networksHigh Score; the webtoon created by Matt WilsonHigh score in relation to video gamesHun stuff (a World War I name for mustard gas)Hail Satan, a phrase commonly used among SatanistsHearth Stone, part of World of WarcraftHarmonized SystemIn prescriptions 'h.s.' can mean: "At bedtime" (from the Latin hora somni)Holy ShitHeavenly Sword A Playstation 3 game
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Noun
1. the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10\-34 joule-second
(synonym) Planck's constant
(hypernym) factor of proportionality, constant of proportionality

out-of-service

additional hour

n. (also: Hs) hassium, transition metal element, element that is ductile