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photosensitive
photosensitize
photosphere
photosynthesis
photosynthesize
photosystem
phototaxis
phototherapy
phototoxic
phototransistor
phototropic
phototropism
phototropy
phototube
phototypeset
phototypesetting
photovoltaic
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photopositive

pho·to·pos·i·tive [ ftō pózzətiv ]


adjective 
Definition:
 
1. showing increasing conductivity as light increases: describes a conductive material whose electrical conductivity increases in response to increasing illumination

2. moving toward light: describes organisms that move toward a light source

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