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phototaxis
phototherapy
phototoxic
phototransistor
phototropic
phototropism
phototropy
phototube
phototypeset
phototypesetting
photovoltaic
photovoltaic cell
photovoltaic effect
phragmites
phrasal verb
phrase
phrase book
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photopheresis

pho·to·phe·re·sis [ ftəfə rssiss ] or pho·to·pho·re·sis [ ftəfə rssiss ]


noun 
Definition:
 
immune enhancement using photoactive drugs: a technique used to enhance the immune system in which a photoactive drug such as psoralen is injected into the body. Blood is removed, exposed to ultraviolet light to activate the drug, then returned to the body to fight the disease.

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