1. With little or no preparation or forethought
   "an extemporary lecture"
   - ad-lib, extemporaneous, extempore, impromptu, offhand, offhanded, off-the-cuff, unrehearsed

See also: extemporarily, unprepared

• Anas discors
• Anas penelope
• Anas platyrhynchos
• Anas querquedula
• Anas rubripes
• Anasa
• Anasa tristis
• anasarca
• anasarcous
• Anasazi
• anaspid
• Anaspida
• anastalsis
• Anastatica
• Anastatica hierochuntica
• anastigmat
• anastigmatic
• anastigmatic lens
• anastomose
• anastomosis
• anastomotic
• anastomotic vein
• Anastomus
• anastrophe
• anastylosis