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 ?
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.