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.
1. any of a class of organic compounds containing the group âCHO, i.e., one with a carbonyl group (CdbondO) located at one end of the carbon chain. 2. a suffix used to denote a compound occurring in aldehyde conformation. 3. acetaldehyde.ach aldehyde is characterized by a carbonyl group (âCOâ) attached directly to a hydrogen (âCHO) in its formula and can be converted into a corresponding acid by oxidation, as in the conversion of acetaldehyde to acetic acid.