There are multiple definitions:

1. laboratory processed [composite] resin(English)

   • CR, LGC, LPR, MOD, MODd, MODi
   • Dentistry, Materials science
   • https://doi.org…3913(08)60006-2

2. line of polarity reversal(English)

   • refers to the point where two groups of cells with oppositely oriented stereociliary bundles meet
   • Auditory system, Electrophysiology
   • https://doi.org…1242/dev.202425