This document defines various geographic terms from A to Z. It provides short definitions or descriptions of each term on its own page. Some of the terms defined include atmosphere, biome, calcite, delta, equator, foothills, gorge, humidity, ingenious, jurisdiction, karst, limestone, magma, navigate, ocean currents, plates, quaternary terms, rain shadow, savanna, tropics, underpopulation, volcano, wharf, xerox, yeasty, and zooplankton. Each entry includes a brief 1-2 sentence definition and many include an image or link to additional information on the term.