| HYPOPHOSPHOROUS | • hypophosphorous adj. (Chemistry) Of or pertaining to hypophosphorous acid or its derivatives. • HYPOPHOSPHOROUS adj. as in hypophosphorous acid, a monobasic acid and a reducing agent. |
| MORPHOPHONOLOGY | • morphophonology n. A branch of linguistics concerned with phonemes, and the phonological representation of morphemes. • MORPHOPHONOLOGY n. the study of the phonemic shape and the phonological representation of a language's morphemes. |
| OESOPHAGOSCOPES | • oesophagoscopes n. Plural of oesophagoscope. • OESOPHAGOSCOPE n. an instrument for examining the oesophagus. |
| OMOPLATOSCOPIES | • OMOPLATOSCOPY n. divination by observing the cracks in a burning shoulder-blade. |
| ORTHOPHOSPHORIC | • orthophosphoric adj. (Chemistry) Describing the ordinary form of phosphoric acid and its derivatives. • ORTHOPHOSPHORIC adj. phosphoric. |
| OVERPROPORTIONS | • overproportions v. Third-person singular simple present indicative form of overproportion. • OVERPROPORTION v. to make disproportionately large. |
| PHOSPHOROSCOPES | • phosphoroscopes n. Plural of phosphoroscope. • PHOSPHOROSCOPE n. an instrument for measuring the duration of phosphorescence after the source of radiation causing it has been removed. |
| 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. |
| 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. |
| PHOTOTOPOGRAPHY | • phototopography n. The surveying and mapping of a terrain based solely on terrestrial photographs. • PHOTOTOPOGRAPHY n. the preparation of topographic maps from photographs. |