plural of electron cloud

(physics) A mathematically defined region around an atomic nucleus defined by a high probability that the atom's electrons will be present in that region.

plural of mushroom cloud

(meteorology) A low, horizontal cloud typically forming at the leading edge of thunderstorm outflow. An arcus type cloud often found along squall lines.

plural of shelf cloud

(meteorology) Grouping of the standard cloud classification system. Members include cirrus, cirrocumulus, cirrostratus, altocumulus, altostratus, nimbostratus, stratocumulus, stratus, cumulus, and cumulonimbus.

A subgrouping of standard cloud classification system, coming after the major cloud genera

plural of cloud genus

(meteorology) An accessory cloud in the form of a cap which occurs above, or attached to, cumulus, cumulonimbus, and sometimes stratocumulus clouds.

plural of cap cloud