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15-letter words containing ho

  • photodissociate — to split or break up molecules as a result of the absorption of photons
  • photoelasticity — the phenomenon of double refraction of polarized light by a transparent substance under elastic stress, used to measure strain in elastic, transparent materials.
  • photoelectronic — relating to electronic effects or devices affected by light
  • photoexcitation — the creation of an increase in energy in atoms, molecules or ions caused by the absorption of a photon
  • photoflood lamp — an incandescent tungsten lamp in which high intensity is obtained by overloading voltage: used in photography, television, etc.
  • photofluorogram — a recording on photographic film of images produced by a fluoroscopic examination.
  • photoheliograph — an instrument for photographing the sun, consisting of a camera and a specially adapted telescope.
  • photoionization — the phenomenon in which the absorption of electromagnetic radiation by an atom in a gas induces the atom to emit a bound electron and thereby become ionized.
  • photojournalism — journalism in which photography dominates written copy, as in certain magazines.
  • photolithograph — Also, photolithoprint [foh-tuh-lith-uh-print] /ˌfoʊ təˈlɪθ əˌprɪnt/ (Show IPA). a lithograph printed from a stone or the like upon which a picture or design has been formed by photography.
  • photomacrograph — a photograph showing a subject at actual size or somewhat larger.
  • photomechanical — noting or pertaining to any of various processes for printing from plates or surfaces prepared by the aid of photography.
  • photomicrograph — a photograph taken through a microscope.
  • photomicroscope — a microscope having an illuminator and a camera mechanism for producing a photomicrograph.
  • photomultiplier — an extremely sensitive detector of light and of other radiation, consisting of a tube in which the electrons released by radiation striking a photocathode are accelerated, greatly amplifying the signal obtainable from small quantities of radiation.
  • photoproduction — the light-induced production of a species of molecule such as a radical or ion
  • photorefractive — of or relating to a change in the index of refraction by spatial variations of the light intensity, as in a laser.
  • photosensitizer — a drug, food, or other chemical that increases sensitivity to light and other visible photons
  • photosynthesize — to produce carbohydrates by photosynthesis: Plants with light green leaves don't photosynthesize as well as those with darker leaves.
  • phototactically — in a phototactic manner
  • phototelegraphy — facsimile (def 2a).
  • phototheodolite — an optical tracking instrument consisting of a camera and theodolite mounted on a single tripod, used in photogrammetry and in tracking rockets.
  • phototopography — topographical surveying employing photogrammetric methods.
  • phototransistor — a transistor that amplifies current induced by photoconductivity.
  • phototropically — in a phototropic manner
  • phototypesetter — a machine for phototypesetting
  • phototypography — (formerly) the art or technique of making printing surfaces by light or photography, by any of a large number of processes.
  • photoxylography — the process of using photography in order to produce an image on wood, for the use of a wood engraver
  • physiopathology — pathophysiology.
  • phytopathogenic — of, possessing the properties of, or relating to a phytopathogen
  • pick and choose — to choose or select from among a group: to pick a contestant from the audience.
  • pick-and-shovel — marked by drudgery; laborious: the pick-and-shovel work necessary to get a political campaign underway.
  • pigeon shooting — the act of hunting and shooting live pigeons
  • plain chocolate — dark eating chocolate
  • plant pathology — the branch of botany dealing with diseases of plants.
  • point of honour — a circumstance, event, etc, that involves the defence of one's principles, social honour, etc
  • point-and-shoot — of or denoting a camera that does not require manual adjustment of shutter speed, focus, aperture, etc.
  • posthole digger — a tool or device for digging a posthole.
  • pseudepigraphon — any book of the Pseudepigrapha
  • psychoacoustics — the study of sound perception.
  • psychobiography — a biographical study focusing on psychological factors, as childhood traumas and unconscious motives.
  • psychobiologist — the use of biological methods to study normal and abnormal emotional and cognitive processes, as the anatomical basis of memory or neurochemical abnormalities in schizophrenia.
  • psychochemistry — the treatment of mental illnesses by drugs
  • psychodiagnosis — a psychological examination using psychodiagnostic techniques.
  • psychogeriatric — the psychology of old age.
  • psychographical — relating to psychographics
  • psychohistorian — a person who writes psychohistory
  • psychologically — of or relating to psychology.
  • psychopathology — the science or study of mental disorders.
  • psychophysicist — a person who specializes in psychophysics
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