View Full Document. Ice Pellets Ice pellets (also called sleet) are refrozen snowflakes. They occur when a layer of air aloft is warm enough (> 0 ï° C) to melt snowflakes into raindrops but the air near the ground is cold enough to freeze the drops.
acarid - very small free-living arachnid that is parasitic on animals or plants; related to ticks. 1  mite - any of numerous very small to minute arachnids often infesting animals or plants or stored foods. 2  Acaridae, family Acaridae - mites.
A relative afferent pupillary defect (APD), established by the swinging or alternating flashlight test, is an important clinical sign that, when abnormal, is one of the best ways to localize vision loss to the pregeniculate afferent visual pathways (retina, optic nerve, chiasm, and optic tract).