1. A line connecting points on the earth's surface having the same mean summer temperature

Derived forms: isotheres

• Brewer's spruce
• brewer's yeast
• brewery
• brewing
• brewpub
• brewski
• Brezhnev
• Brian Cowen
• Brian Mulroney
• briar
• briar pipe
• briard
• briarroot
• briarwood
• briary
• bribable
• bribe
• briber
• bribery
• bric-a-brac
• brick
• brick cheese
• brick in
• brick over
• brick red