1. (astronomy) a line of constant light intensity

Derived forms: isophotes

• emergency landing
• emergency medicine
• emergency procedure
• emergency room
• emergent
• emergent evolution
• emerging
• emeritus
• emersion
• Emerson
• emery
• emery board
• emery cloth
• emery paper
• emery rock
• emery stone
• emery wheel
• Emeside
• emesis
• emesis basin
• emetic
• emetine
• Emetrol
• emf
• EMG