1. Flask with double walls separated by vacuum; used to maintain substances at high or low temperatures
   - vacuum flask [Brit, Cdn]

Derived forms: vacuum bottles

Type of: flask

Encyclopedia: Vacuum bottle

• ornamentation
• ornate
• ornately
• ornateness
• orneriness
• ornery
• ornithine
• Ornithischia
• ornithischian
• ornithischian dinosaur
• Ornithogalum
• Ornithogalum pyrenaicum
• Ornithogalum thyrsoides
• Ornithogalum umbellatum
• ornithological
• ornithologist
• ornithology
• ornithomimid
• Ornithomimida
• ornithopod
• ornithopod dinosaur
• Ornithopoda
• ornithopter
• Ornithorhynchidae
• Ornithorhynchus