1The earliest possible date for something.
- We can establish a terminus a quo, the earliest possible date at which the book could have been finalized.
- In fact, the chapter's conclusion only states a terminus a quo with any conviction, while his earlier confidence regarding a terminus ante quem seems to disappear unexplainably.
- If the terminus a quo does not lie within the decade A.D.70-80, it cannot well be pushed back earlier than A.D.95.
Latin, literally 'end from which'.
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