Stadial

A stadial is a period of lower temperatures during an interglacial (warm period) separating the glacial periods of an ice age. Such periods are of insufficient duration or intensity to be considered glacial periods. Notable stadials include the Older Dryas and Younger Dryas stadials and the Little Ice Age. An interstadial is a warm period during a...
Found on http://en.wikipedia.org/wiki/Stadial

stadial

of, like or pertaining to a stage
Found on http://phrontistery.info/s.html
No exact match found