1. A ball that slides down a staff to show a fixed time; especially at an observatory

Derived forms: time-balls

Type of: ball, globe, orb

Part of: horologe, timekeeper, timepiece

Encyclopedia: Time-ball

• Hybanthus
• hybrid
• hybrid petunia
• hybrid tuberous begonia
• hybrid vigor
• hybridisation
• hybridise
• hybridising
• hybridism
• hybridity
• hybridization
• hybridize
• hybridizing
• hybridoma
• hydantoin
• hydathode
• hydatid
• hydatid disease
• hydatid mole
• hydatidiform mole
• hydatidosis
• Hyderabad
• trumpery
• trumpet
• trumpet arch