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Date: Mon Apr 15 00:01:07 EDT 2002
Subject: A.Word.A.Day--ecdemic
ecdemic (ek-DEM-ik) adjective

Of foreign origin; introduced from outside; pertaining to a disease that's observed far from the area it originates in.

[From Greek ec-, variant of ex- (out of) + -demic (on the pattern of epidemic), from demos (people).]

Looks like the antonym of endemic, both from first impressions and based on the definition.