hail
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GC: n

S: http://www.wunderground.com/resources/severe/hail.asp (last access: 14 July 2015); http://www.n-d-a.org/snow-hail-storm.php (last access: 14 July 2015).

N: 1. “frozen rain, pellets of ice falling in showers,” Old English hægl, hagol (Mercian hegel) “hail, hailstorm,” also the name of the rune for H, from Proto-Germanic *haglaz, probably from PIE *kaghlo- “pebble”.
2. Precipitation of either transparent, or partly or completely opaque particles of ice (hailstones), usually spheroidal, conical or irregular in form and of diameter very generally between 5 and 50 millimetres, which falls from a cloud either separately or agglomerated into irregular lumps.

S: 1. OED – http://www.etymonline.com/index.php?term=hail (last access: 14 july 2015). 2. METEOTERM/International Meteorological Vocabulary, WMO – No. 182 (last access: 14 July 2015).

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CR: freezing fog, frost, glaze, hailstone, hoar frost, rime, sleet, small hail.