kybp

noun[plural only]1

1. •
   Initialism of kiloyears before present.

   • In H 2, the recent colonization model, population 2 is modeled as being colonized from refugial population 1 subsequent to the LGM (0 to 20 kybp; Fig. 3A ). — 2009

noun1

1. •
   Initialism of kiloyears before present; thousands of years before present.