irregular crystal

irregular crystal

[i′reg·yə·lər ′krist·əl]
(meteorology)
A snow particle, sometimes covered by a coating of rime, composed of small crystals randomly grown together; generally, component crystals are so small that the crystalline form of the particle can be seen only through a magnifying glass or microscope.
References in periodicals archive ?
8A-C); 5) the absence of fabrics that are characteristic of neomorphic calcite ("all transformations between one mineral and itself or polymorph"; Folk, 1965), such as irregular crystal sizes, wavy or curved inter-crystalline boundaries, and floating relics in the interior of the crystals.
Summary: TEHRAN (FNA)- Results of new studies showed that shoals of fish and swarms of krill hang out in groups that take on the same overall shape, which is not a simple sphere, a cylinder, or ovoid, but something more akin to an irregular crystal.
Regular shape particles were formed from solutions of low dielectric constant such as ethanol and THF and irregular crystals were formed from a solvent with a higher dielectric constant such as water.
Strains isolated from Braulio Carrillo, Tortuguero and Cahuita, presented predominantly irregular crystals.
Also, some strains presented small and large bipyramidal as well as irregular crystals (Fig.