CLIMAP
Climate: Long-range Investigation, Mapping, and Prediction - a major research project of the 1970s and 80s to produce a map of climate conditions during the Last Glacial Maximum, roughly 18,000 years ago and earlier.
All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.