1. Having one barrel
   "most guns are single-barreled"
   - single-barrelled [US]

Antonym: double-barreled [US]

• allograph
• allographic
• allomerism
• allomerous
• allometric
• allometry
• allomorph
• allomorphic
• allonge
• allopath
• allopathic
• allopathy
• allopatric
• allopatry
• allophone
• allophonic
• allopurinol
• allosaur
• allosaurus
• allot
• bowl-shaped
• bowlder
• bowleg
• bowlegged
• bowler