agoraphobia (n.) Look up agoraphobia at Dictionary.com
"fear of crossing open spaces," 1873, from German Agorophobie, coined 1871 by Berlin psychiatrist Carl Westphal (1833-1890) from Greek agora "place of assembly, city market" (but here with the general sense "open space;" see agora) + -phobia "fear." Related: Agoraphobe; agoraphobic.