15-Letter Words Containing: P,A,R,E,R,G,A

• radiography using X-rays and xerographic (rather than roentgenographic) techniques

• equipment that enables a sophisticated separation, e.g. gas chromatographic or liquid chromatographic separation.

• a photographer who operates a movie camera

• telegraphy that uses transmission by radio rather than by wire

• the use of radio to send telegraphic messages (usually by Morse code)

• someone who writes their own biography