roof garden 
noun
A garden on the flat roof of a building.Obviously people are being driven towards energy efficiency in buildings, and the roof garden would be one way of ensuring that you save energy....
- Designed by John Fleming Architects, all units have balconies and en suites, and each apartment block will have its own roof garden and landscaped courtyard areas, with a new market green at the front.
- For those who want to garden now, starting a roof garden can cost as little as $30.
- photophosphorescent
- photophosphorylation
- photophthalmia
- photophysical
- photophysics
- photopia
- photopic
- photo-piece
- photopigment
- photopile
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- photoplethysmograph
- photoplethysmographic
- photoplethysmography
- photopolarimeter
- photopolarimetric
- photopolarimetry
- photopolymer
- photopolymerisation
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- photopolymerizability
- photopolymerizable
- photopolymerization
- photopolymerize