- materMother.
- matriarchA female leader of a family, a tribe or an ethnic or religious group.
- matriarchyA social system in which the mother is head of household, having authority over men and children, and lineage is traced through the female line.
- madreporeA coral of the genus Madrepora or of the order Madreporaria.
- matri-mother
- matroclinousHaving mostly maternally inherited characteristics.
- phycomaterA gelatin in which the algae spores have been supposed to vegetate.