A common term in the Rheingau(Germany) for the morning autumn fog that often occurs near the river and often only dissipates in the late morning. These provide protection from early frost and favour the botrytis (noble rot) required for sweet wines such as Trockenbeerenauslese. See also under grape cooker.
In the past, you needed a wealth of encyclopaedias and specialist literature to keep up to date in your vinophile professional life. Today, Wine lexicon from wein.plus is one of my best helpers and can rightly be called the "bible of wine knowledge".
Prof. Dr. Walter Kutscher
Lehrgangsleiter Sommelierausbildung WIFI-Wien