Also found in: Thesaurus, Encyclopedia, Wikipedia.
A thin ice crystal floating high in the atmosphere in certain conditions of clear, cold weather.
(Physical Geography) meteorol one of many needle-like ice crystals that form cirrus clouds in clear cold weather
an acicular ice crystal afloat in the atmosphere.
Switch to new thesaurus
|Noun||1.||ice needle - small crystals of ice |
downfall, precipitation - the falling to earth of any form of water (rain or snow or hail or sleet or mist)
H2O, water - binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent
crystal - a solid formed by the solidification of a chemical and having a highly regular atomic structure