| phosphorus |
a multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells; is highly reactive and occurs in several allotropic forms morning star: a planet (usually Venus) seen just before sunrise in the eastern sky
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| photosensitize |
make (an organism or substance) sensitive to the influence of radiant energy and especially light
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| phototropism |
an orienting response to light
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| photosynthetic |
relating to or using or formed by photosynthesis
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| phot |
a unit of illumination equal to 1 lumen per square centimeter; 10,000 phots equal 1 lux
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