| ASTROPHOTOGRAPH | • astrophotograph n. Alternative form of astrophoto. • ASTROPHOTOGRAPH n. a photograph of a celestial body. |
| CORTICOTROPHINS | • corticotrophins n. Plural of corticotrophin. • CORTICOTROPHIN n. a hormone that stimulates the adrenal gland, also CORTICOTROPIN. |
| MICROPHOTOMETER | • microphotometer n. (Physics) Any of various photometers used either to measure the variation of densities over small areas… • MICROPHOTOMETER n. an instrument for measuring the amount of light transmitted or reflected by small areas or for measuring the relative densities of spectral lines on a photographic film or plate. |
| MICROPHOTOMETRY | • microphotometry n. Measurement performed with a microphotometer. • MICROPHOTOMETRY n. measurement by microphotometer, an instrument for measuring the amount of light transmitted or reflected by small areas or for measuring the relative densities of spectral lines on a photographic film or plate. |
| ORTHOCHROMATISM | • orthochromatism n. Quality of being orthochromatic. • ORTHOCHROMATISM n. the state of being orthochromatic, of photographic film, sensitive to all colours except red. |
| PHOTOTRANSISTOR | • phototransistor n. (Electronics) Any semiconductor device whose electrical characteristics are light-sensitive. • PHOTOTRANSISTOR n. a junction transistor, whose base signal is generated by illumination of the base. |
| PROTHONOTARIATS | • prothonotariats n. Plural of prothonotariat. • PROTHONOTARIAT n. the college constituted by the twelve apostolical prothonotaries (bishops and senior members of the curia) in Rome, also PROTONOTARIAT. |
| PROTOHISTORIANS | • protohistorians n. Plural of protohistorian. • PROTOHISTORIAN n. one who studies protohistory. |
| PYROPHOTOMETERS | • PYROPHOTOMETER n. a type of pyrometer in which the temperature of an incandescent body is determined by photometric measurement of the light it emits. |
| TRIBROMOETHANOL | • tribromoethanol n. An anaesthetic now mainly used in laboratory animals. • TRIBROMOETHANOL n. a soluble white crystalline compound with a slight aromatic odour, used as a general anaesthetic. |
| TROUBLESHOOTERS | • troubleshooters n. Plural of troubleshooter. • TROUBLESHOOTER n. a skilled worker employed to locate trouble and make repairs in machinery and technical equipment. |