MRS

noun5

1. •
   Initialism of magnetic resonance spectroscopy.
2. •
   Initialism of marginal rate of substitution.
3. •
   (slang) Ellipsis of MRS degree
4. •
   Initialism of mandibular repositioning splint.
5. •
   Initialism of metabolic risk score.

noun2

1. •
   A title used for a woman before a place name, thing, or description that she is supposed to typify or represent. #
2. •
   a short written form of "Missus", used as a title before a woman's name once she has married

   • Mrs Mal[aprop]. O, there's nothing to be hoped for from her! she's as headstrong as an allegory on the banks of the Nile. — 1775