| ANTHROPOSOPHIST | • anthroposophist n. A proponent of anthroposophy. • ANTHROPOSOPHIST n. one versed in anthroposophy, knowledge of the nature of humanity. |
| ASTROPHOTOGRAPH | • astrophotograph n. Alternative form of astrophoto. • ASTROPHOTOGRAPH n. a photograph of a celestial body. |
| COMPOTATIONSHIP | • COMPOTATIONSHIP n. being a drinking companion. |
| DIAPHOTOTROPIES | • DIAPHOTOTROPY n. the state of being diaphototropic, turning transversely to the light. |
| DIAPHOTOTROPISM | • DIAPHOTOTROPISM n. the state of being diaphototropic, turning transversely to the light. |
| ORTHOPHOSPHATES | • orthophosphates n. Plural of orthophosphate. • ORTHOPHOSPHATE n. a salt or ester of orthophosphoric acid. |
| PHOTOAUTOTROPHS | • photoautotrophs n. Plural of photoautotroph. • PHOTOAUTOTROPH n. an organism capable of synthesizing its own food from inorganic substances using light as an energy source. |
| PHOTOLITHOGRAPH | • photolithograph n. A lithograph made by photolithography. • photolithograph v. To produce (a picture or copy) by the process of photolithography. • PHOTOLITHOGRAPH n. a plate produced by photolithography. |
| PHOTOPRODUCTION | • photoproduction n. (Chemistry) The production of a molecular species (e.g. a radical or ion) by means of light. • PHOTOPRODUCTION n. the production of one or more particles by the action of an incident photon. |
| PHOTORECEPTIONS | • photoreceptions n. Plural of photoreception. • PHOTORECEPTION n. the perception of waves in the range of visible light. |
| PHOTOTOPOGRAPHY | • phototopography n. The surveying and mapping of a terrain based solely on terrestrial photographs. • PHOTOTOPOGRAPHY n. the preparation of topographic maps from photographs. |
| PHOTOTROPICALLY | • phototropically adv. In a phototropic manner. • PHOTOTROPIC adv. relating to phototropism, movement directed by light. |
| PHOTOTYPOGRAPHY | • phototypography n. A photomechanical method of printing made to resemble traditional metal typography. • PHOTOTYPOGRAPHY n. any printing process involving the use of photography. |
| 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. |