1. Occurring ever half hour

1. Every thirty minutes, every half hour

See also: periodic, periodical

• forewarn
• forewarning
• forewing
• forewoman
• foreword
• forex
• foreyard
• forfeit
• forfeited
• forfeiture
• forfend
• forficate
• Forficula
• Forficula auricularia
• Forficulidae
• forgather
• forge
• forged
• forger
• forgery
• forget
• forget me drug
• forget-me-not
• forgetful
• forgetful person