barometer /bə-romˈi-tər/

1. An instrument for measuring atmospheric pressure
2. A weather glass
3. An indicator of change (eg in public opinion; figurative; also adjective)

• phototropism
• phototropisms
• phototropy
• phototube
• phototubes
• phototype
• phototyped
• phototypes
• phototypesetter
• phototypesetters
• phototypesetting
• phototypic
• phototypies
• phototyping
• phototypy
• photovoltaic
• photovoltaic cell
• photovoltaics
• photoxylography
• photozincograph
• photozincographs
• photozincography
• phots
• phr
• phrasal