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YBP

  1. (archaeology, geology, paleontology) Initialism of years before present.
    Synonym: BP
    • 2022, Cherl-Ho Lee, Korean Food and Foodways: The Root of Health Functional Food, Springer Nature, →ISBN, page 23:
      Baked clay ornaments and other objects dating from 28,000 YBP have been discovered in Eastern Europe, []

Usage notes edit

A year designation alternative to the widely-used but Christian-oriented designations BC and AD and their secular equivalents BCE and CE. Used in historical sciences, especially when the exact number of years is unknown, and where precision and the current year are not significant.

Conventionally, “present” refers to the origin of practical radiocarbon dating in the 1950s, sometimes made explicit with the abbreviation RCYBP (radio carbon years before present).

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