1. Occurring ever half hour

1. Every thirty minutes, every half hour

See also: periodic, periodical

• incestuous
• incestuously
• inch
• Incheon
• inchmeal
• inchoate
• inchoative
• inchoative aspect
• Inchon
• inchworm
• incide
• incidence
• incidence angle
• incident
• incidental
• incidental expense
• incidental music
• incidentally
• incienso
• incinerate
• incineration
• incinerator
• incipience
• incipiency
• incipient