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photorespiration
photosensitise
photosensitive
photosensitize
photosphere
photosynthesis
photosynthesize
photosystem
phototaxis
phototherapy
phototoxic
phototransistor
phototropic
phototropism
phototropy
phototube
phototypeset
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photopigment
pho·to·pig·ment [ ftō pígmənt ] (plural pho·to·pig·ments)


noun 
Definition:
 
light-absorbing chemical: a light-absorbing chemical that converts light into biochemical energy, e.g. in the rods and cones of the eye
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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