epoch(redirected from December 31, 1969)
Also found in: Dictionary, Thesaurus, Encyclopedia.
epochIn clinical trials, the interval of time in the planned conduct of a study—the term epoch is intended to replace period, cycle, phase, stage and other temporal terms. An epoch is associated with a purpose (e.g., screening, randomisation, treatment, follow-up), and applies across all arms of the study.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
A measurable amount of time; e.g., the length of time used in standardized sleep studies (usually 30 sec to 1 min), or the duration of a particular geological or biological event, as indicated in earth sciences.
Medical Dictionary, © 2009 Farlex and Partners