Geology. Of a period of prehistory: characterized by a warm, mild climate; spec. designating an interglacial period. Now historical.

Geology. Designating any of various periods of relatively high average rainfall in low and intermediate latitudes, esp. during the Pleistocene…

Applied by Blytt to the next period of vegetation in Scandinavia after the arctic period, and later by others to the climate of other areas.

Ecology and Climatology. Designating the most recent northern European climatic stage, beginning about 2,600 years ago following the sub-Boreal…

spec. Usually with capital initial or initials. Designating a warm and relatively dry climatic stage in northern Europe, following the Atlantic…

Designating any of the periods of generally drier conditions in equatorial latitudes during the geological past (esp. the Pleistocene) which…

Of, pertaining to, or designating relatively short, drier periods (less marked than interpluvials) that may have occurred during pluvials.

Applied by Blytt to one of the successive periods of vegetation in Scandinavia after the glacial period, and later by others to the climate of other…

designating that period of the geologically recent past (7000 to 600 b.c.) when relatively warm conditions prevailed in the northern hemisphere; also…