photodynamism

photodynamism

      conversion of certain substances in the skin of animals into other substances by the action of light. The resultant compounds may be beneficial (e.g., vitamin D), but in some cases they produce disorders of the skin. The original compound may be present in normal skin; it may be derived from certain foods; it may result from an inherited biochemical defect; or it may be a combination of the preceding.

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Universalium. 2010.

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  • radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …   Universalium

  • φωτοδυναμισμός — ο, Ν ζωολ. το φαινόμενο τής μετατροπής ορισμένων ουσιών στο δέρμα τών ζώων σε άλλες ουσίες, υπό την επίδραση τού φωτός. [ΕΤΥΜΟΛ. Αντιδάνεια λ., πρβλ. αγγλ. photodynamism] …   Dictionary of Greek

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