hoar frost

A type of icing that occurs in clear air on a surface whose temperature falls below the frost point of the air in contact with it. The water vapor condenses into white crystalline coating of ice that is usually of a feathery nature. This type of clear air icing may occur on an aircraft parked on ground or in air when it enters into a region where the air is warm and moist and after the aircraft has flown in a region of subzero temperature.

Aviation dictionary. 2014.

Look at other dictionaries:

  • hoar frost — f8 [hoar frost] [ˈhɔː frɒst] [ˈhɔːr frɔːst] noun uncountable a layer of small pieces of ice that look like white needles and that form on surfaces outside when temperatures are very low …   Useful english dictionary

  • hoar|frost — «HR FRST, FROST; HOHR », noun. the white, feathery crystals of ice formed when dew freezes; white frost; rime …   Useful english dictionary

  • hoar frost — ► NOUN ▪ a greyish white feathery deposit of frost …   English terms dictionary

  • hoar-frost — UK [ˈhɔː(r) ˌfrɒst] US [ˈhɔrˌfrɑst] noun [singular/uncountable] very small pieces of white ice that cover plants and the ground Thesaurus: frost, icy weather and freezingsynonym …   Useful english dictionary

  • hoar-frost — šerkšnas statusas T sritis chemija apibrėžtis Iš rūko ir garų susidariusios dendritinės struktūros ledo nuogulos. atitikmenys: angl. hoar frost rus. иней …   Chemijos terminų aiškinamasis žodynas

  • hoar-frost — šarma statusas T sritis ekologija ir aplinkotyra apibrėžtis Ledo kristalų sluoksnis, nusėdęs ant žemės paviršiaus ir įvairių daiktų kondensuojantis vandens garams. Susidaro, kai oro drėgmė didelė, o žemės paviršius, išspinduliuodamas šilumą,… …   Ekologijos terminų aiškinamasis žodynas

  • hoar-frost — n. White frost, frozen dew …   New dictionary of synonyms

  • hoar frost — noun frozen water vapour deposited in clear still weather on vegetation and other surfaces …   English new terms dictionary

  • hoar-frost — UK [ˈhɔː(r) ˌfrɒst] / US [ˈhɔrˌfrɑst] noun [singular/uncountable] very small pieces of white ice that cover plants and the ground …   English dictionary

  • Иней (Frost/Hoar frost) — 4.15 Иней (Frost/Hoar frost) . Кристаллики льда, которые образуются при насыщенном относительно льда воздухе при температуре ниже 0 °С (32 °F) путем сублимации на поверхности земли или других объектах. Источник: Письмо 03.10 7: Рекомендации по… …   Словарь-справочник терминов нормативно-технической документации


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