The day when graduating medical-school students find out where they will serve as residents. / (sports) The day on which a sporting event takes place.

plural of match-maker

Dated spelling of fecal matter.

plural of square matrix

(idiomatic) An inevitable result; something that is bound to happen.

(biology) The material within the space, enclosed by the mitochondrial inner membrane. It is composed of enzymes, DNA filaments, granules, protein crystals, glycogen, and lipid.

plural of mitochondrial matrix

(dated) A coarse cloth.

the child of a woman's daughter: a grandchild to whom one is the maternal grandmother

plural of territorial matrix