Cirrus clouds over Wrynose Bottom: learning a new word

Cirrus clouds are well known for warning of approaching bad weather because they form ahead of a front. These clouds yesterday may be the herald of the thunder storms expected today, but there does seem to have been a much longer time delay than I understood to be the case. They form ahead of a warm front when hot and cold air meet. Well, they certainly heralded the arrival of very warm air though not rain today. Cirrus clouds are at least 6km up in the atmosphere, so probably even higher than Everest. Looking them up again, I learned a new word - deposition https://www.metoffice.gov.uk/weather/learn-about/weather/types-of-weather/clouds/high-clouds/cirrus I know that sublimation means going directly from solid to gas but deposition is apparently the word for the direct transition from gas to solid.