There are multiple definitions:

1. minimal reacting dose(English)

   • smallest quantity of a (toxic) substance causing a reaction
   • Toxicology

2. minimal residual disease(English)

   • term used to describe the small number of cancer cells in the body after cancer treatment
   • EFS, uMRD
   • Oncology
   • https://www.can…esidual-disease

3. mortality rate doubling(English)

   • MPM
   • Epidemiology, Prognosis

4. margin [to] reflex distance(English)

   • represents the clinical measure of the position of the eyelids. It is an important parameter in the evaluation of eyelid ptosis and retraction, and that is widely used by oculoplastic surgeons in clinical practice
   • TCM, PFH
   • Ophthalmology, Surgery
   • https://doi.org…30.2022.2092155
   • https://doi.org…30.2021.1892770