Greek 'n' Stuff Title

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English Words from Our Greek Word

This month's Greek word
  • aphotic  (having no light)

  • euphotic  (of, relating to, or being the uppermost layer of a body of water that receives sufficient light for photosynthesis and the growth of green plants)

  • phosphene  (a sensation of light caused by excitation of the retina by mechanical or electrical means rather than by light, as when the eyeballs are pressed through closed lids)

  • phosphorescence  (persistent emission of light following exposure to and removal of incident radiation)

  • photic  (of or relating to light)

  • photoactive  (capable of responding to light photoelectrically)

  • photoautotroph  (an organism capable of synthesizing its own food from inorganic substances using light as an energy source. Green plants and photosynthetic bacteria are photoautotrophs.)

  • photobiology  (the study of the effects of light on living organisms and biological processes)

  • photobiotic  (depending on light for life and growth)

  • photochemistry  (the chemistry of the effects of light on chemical systems)

  • photocoagulation  (surgical coagulation of tissue by means of intense light energy, such as a laser beam, performed to destroy abnormal tissues or to form adhesive scars, especially in ophthalmology)

  • photoconductivity  (electrical conductivity affected by exposure to light)

  • photodegradable  (capable of being chemically broken down by light)

  • photodynamic  (of or relating to the energy of light)

  • photoelectric  (of or relating to the electric effects, especially increased conductivity, caused by light)

  • photogram  (an image produced without a camera by placing an object in contact with film or photosensitive paper and exposing it to light)

  • photograph  (an image, especially a positive print, recorded by a camera and reproduced on a photosensitive surface)

  • photokinesis  (movement as a response to light)

  • photolysis  (chemical decomposition induced by light or other radiant energy)

  • photometer  (an instrument for measuring a property of light, especially luminous intensity or flux)

  • photomicroscope  (an instrument consisting of a microscope, camera apparatus, and light source used for making photomicrographs)

  • photon  (a unit of retinal illumination, equal to the amount of light that reaches the retina through 1 square millimeter of pupil area from a surface having a brightness of 1 candela per square meter)

  • photoperiod  (the duration of an organism's daily exposure to light, considered especially with regard to the effect of the exposure on growth and development)

  • photophilic  (growing or functioning best in strong light)

  • photophobia  (an abnormal sensitivity to or intolerance of light, especially by the eyes, as may be caused by eye inflammation, lack of pigmentation in the iris, or various diseases)

  • photophore  (a light-producing organ found especially in marine fishes that emits light from specialized structures or derives light from symbiotic luminescent bacteria)

  • photopia  (vision in bright light, mediated by cone cells of the retina; daylight vision)

  • photosensitivity  (sensitivity or responsiveness to light)

  • photosphere  (the visible outer layer of a star, especially of the sun)

  • photosynthesis  (the process in green plants and certain other organisms by which carbohydrates are synthesized from carbon dioxide and water using light as an energy source)

  • phototaxis  (the movement of an organism or a cell toward or away from a source of light)

  • phototherapy  (the treatment of a disorder, especially of the skin, by exposure to light, including ultraviolet and infrared radiation)

  • phototonus  (the state of being sensitive to or irritated by light)

  • phototropism  (growth or movement of a sessile organism toward or away from a source of light)

  • photovoltaic  (capable of producing a voltage when exposed to radiant energy, especially light)

Definitions are taken from:

The American HeritageĀ® Dictionary of the English Language, Third Edition copyright Ā© 1992 by Houghton Mifflin Company.

Electronic version licensed from InfoSoft International, Inc. All rights reserved.

Webster's Third New International Dictionary, Unabridged. Merriam-Webster, 2002. (30 Sep. 2006).

English-Word Information: Word Info about English Vocabulary (