primer /prīˈmər or primˈər/ or primmer /primˈer/

1. A small prayer book or book of hours for lay people, used also for teaching reading
2. A first reading-book
3. An elementary introduction to any subject
4. /primˈər/ printing type of two obsolete sizes, long primer (approx 10-point) and great primer (approx 18-point)

• radiograms
• radiograph
• radiographer
• radiographers
• radiographic
• radiographically
• radiographies
• radiographs
• radiography
• radio ham
• radio hams
• radioimmunoassay
• radioing
• radio interferometer
• radioisotope
• radioisotopes
• radioisotopic
• radiolabelled
• Radiolaria
• radiolarian
• radiolarian ooze
• radiolarians
• radiolocation
• radiolocations
• radiologic