There are multiple definitions:

1. upper limit of agreement(English)

   • LLA
   • Statistics
   • https://doi.org…acc.2021.08.017

2. ultra-low attachment(English)

   • refers to plates to screen for better cancer drug leads
   • HNSCC, MCTS
   • Screening, Pharmacology / pharmaceutics, Oncology
   • https://doi.org…89/adt.2018.896