| photo ID |
a card with a person's name and photograph. A photo ID is used to prove that a person is who he says he is. |
| photojournalism |
journalism that primarily uses photographs rather than written text. |
| photolithography |
a technique or process of offset printing in which an image is photographically transferred onto a metal or paper sheet that is then developed and specially treated to resist ink on all but the transferred image. |
| photolysis |
the chemical breakdown or decomposition of matter caused by the absorption of light. |
| photomap |
a map of one or more aerial photographs onto which identifying names and markings have been superimposed. [2 definitions] |
| photomechanical |
pertaining to or designating any process by which plates used in printing are prepared by photographic means. |
| photometer |
an instrument that measures the intensity, distribution, and color of light. |
| photometry |
the measurement of light, esp. its intensity or fluctuation. |
| photomicrograph |
a photograph of a small object taken through a microscope. |
| photomontage |
the technique of making a photographic composition by combining parts or elements of more than one photograph, often with the addition of other graphic material. [2 definitions] |
| photomultiplier |
an electronic device that detects and amplifies electromagnetic radiation, esp. in the visible range; photomultiplier tube. |
| photomultiplier tube |
an electronic device that detects and amplifies electromagnetic radiation, esp. in the visible range; photomultiplier. |
| photomural |
one or more very large photographs used as a mural. |
| photon |
the fundamental unit of electromagnetic energy with zero mass, no electrical charge, and a spin of one, usu. regarded as an elementary particle. |
| photonics |
the branch of physical science that deals with the properties and applications of light, esp. as a medium for transmitting information. |
| photo-offset |
a method of offset printing in which an inked photolithographic image is transferred from a metal plate to a rubber blanket or roller and then printed on paper. [2 definitions] |
| photooxidation |
oxidizing caused by light or some other kind of radiation. |
| photoperiodism |
the effect, as on growth or behaviors in plants or animals, caused by variations in the lengths of time they are exposed to light. |
| photophobia |
an abnormal fear of or painful sensitivity to light, sometimes resulting from eye ailments. |
| photopia |
vision during conditions of bright light or normal daylight. (Cf. scotopia.) |
| photoplay |
the written text of a play intended for presentation on film rather than on the stage; screenplay. |