tufa /tooˈfə, tūˈfə/

1. Calc-sinter (often calcareous tufa)
2. Tuff or other porous rock (obsolete)

• primary cell
• primary cells
• primary coil
• primary coils
• primary colours
• primary election
• primary elections
• primary meristem
• primary meristems
• primary phase
• primary planet
• primary planets
• primary process
• primary processes
• primary production
• primary school
• primary schools
• primary stress
• primary stresses
• primatal
• primate
• primates
• Primates
• primateship
• primateships