Chapter Parter to Parting of P by Webster's Dictionary (1913 Edition)

5. (Chem.) The separation and determination of alloys; esp., the separation, as by acids, of gold from silver in the assay button.

6. (Geol.) A joint or fissure, as in a coal seam.

7. (Naut.) The breaking, as of a cable, by violence.

8. (Min.) Lamellar separation in a crystallized mineral, due to some other cause than cleavage, as to the presence of twinning lamellæ.