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1. Obstruction or occlusion of a blood vessel by an embolus.
2. An embolus.

[Middle English embolisme, insertion of one or more days in a calendar, from Late Latin embolismus, from Greek embolismos, from emballein, to insert; see emblem.]

em′bo·lis′mic adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
While the year is not given, other coins datestamped with embolismic months, including one explicitly datestamped as Dystros Embolimos in SEM 317 = A.D.
Because solar years cannot be evenly divided into lunar months, an extra embolismic or intercalary month must be added to prevent the starting date of the lunar cycles from "drifting" away from the spring season.