1. Occurring ever half hour

1. Every thirty minutes, every half hour

See also: periodic, periodical

• standard of life
• standard of living
• standard of measurement
• standard operating procedure
• standard poodle
• standard pressure
• standard procedure
• standard schnauzer
• standard temperature
• standard time
• standard transmission
• standard-bearer
• standardisation
• standardise
• standardised
• standardiser
• standardization
• standardize
• standardized
• standardizer
• standby
• standdown
• standee
• stander
• standing