any cloud whose existence and form are largely controlled by the disturbed flow of air over and around mountains, as the banner cloud and crest cloud.
noun 1. precipitation caused by the lifting of moist air over a mountain barrier.
[awr-oh-ahyd, ohr-] /ˈɔr oʊˌaɪd, ˈoʊr-/ noun 1. an alloy containing copper, tin, etc., used to imitate gold. /ˈɔːrəʊˌaɪd/ noun 1. an alloy containing copper, tin, and other metals, used as imitation gold
[aw-rog-ruh-fee, oh-rog-] /ɔˈrɒg rə fi, oʊˈrɒg-/ noun 1. the branch of physical geography dealing with mountains. /ɒˈrɒɡrəfɪ/ noun 1. the study or mapping of relief, esp of mountains
orolingual o·ro·lin·gual (ôr’ō-lĭng’gwəl) adj. Relating to the mouth and tongue.