Geography Dictionary

insolation	the sun's energy received by the earth

international date line	an imaginary line near 180° longitude that exists to separate the two simultaneous days that exist on the planet that the same time

isoline	a line connecting points of equal value. see the list of over two dozen different types of isolines

itcz (intertropical convergence zone)	the zone of low pressure near the equator where the trade winds converge and create heavy convectional precipitation; also known as the intertropical front (itf)

Glossaries and Dictionaries

Geographic dictionaries and glossaries from your About.com Guide.

Earth Science

Oceanography and the Related Geosciences

Illustrated Glossary of Geologic Terms

Archaeological Resource

French-English and German-English online dictionaries for archaeologists (offering context as well as definition).

Anthromorphmics: Anthropology Glossary

Browse or search the entire glossary or list terms by one of three fields: Archaeology, Cultural Anthropology, or Physical Anthropology, Anthropology Department, University of California, Santa Barbara.