primary amenorrhea; primary atypical pneumonia; primary care; primary care physician; primary care provider; primary cell; primary censorship; primary coil; primary color; primary color for light; primary color for pigments; primary colour; primary colour for light; primary colour for pigments; primary dentition; primary dysmenorrhea; primary election; primary feather; primary health care; primary quill; primary school; primary sex character; primary sex characteristic; primary sexual characteristic; primary solid solution; primary subtractive color for light; primary subtractive colour for light; primary syphilis; primary tooth; primary winding;