1. According to need (physicians use PRN in writing prescriptions)
   - as needed, as required, PRN

Encyclopedia: Pro re nata

• awkward
• awkwardly
• awkwardness
• awl
• awl-shaped
• awless
• awlwort
• awn
• awned
• awning
• awning deck
• awninged
• awnless
• awnless bromegrass
• awny
• awol
• awry
• ax
• ax handle
• ax head
• axe
• axe handle
• axe head
• axel
• axenic