| CRYOPHORUS | • cryophorus n. (Chemistry) An instrument used to illustrate the freezing of water by its own evaporation. The ordinary… • CRYOPHORUS n. an instrument for showing the decrease in the temperature of water by its evaporation. |
| HOROGRAPHY | • horography n. (Historical) local history (in Ancient Greece) that involved the description of events. • horography n. The art of constructing dials or instruments for indicating the hours. • HOROGRAPHY n. the art of constructing sundials or clocks. |
| HYDROPOWER | • hydropower n. Hydroelectric power. • HYDROPOWER n. water power. |
| OREOGRAPHY | • oreography n. Alternative form of orography. • OREOGRAPHY n. the science of mountains, also OROGRAPHY. |
| OROPHARYNX | • oropharynx n. (Anatomy) The oral part of the pharynx, reaching from the uvula to the level of the hyoid bone. • oro-pharynx n. Alternative spelling of oropharynx. • OROPHARYNX n. the part of the pharynx between the soft palate and the epiglottis. |
| ORTHOPHYRE | • orthophyre n. (Geology) a porphyritic rock that contains phenocrysts of orthoclase embedded in feldspar. • ORTHOPHYRE n. a fine-grained syenitic rock with orthoclase crystals. |
| ORTHOPRAXY | • orthopraxy n. Correct practice or action. • orthopraxy n. Right belief combined with right practice, with the emphasis being on the latter, a term specially used… • ORTHOPRAXY n. the treatment of deformities in the human body by mechanical appliances. |
| ORTHOTROPY | • orthotropy n. The condition of being orthotropic. • ORTHOTROPY n. the state of being orthotropic, growing along a vertical axis. |
| PLEROPHORY | • plerophory n. Fullness, especially of conviction or persuasion; the state of being fully persuaded. • PLEROPHORY n. full conviction, also PLEROPHORIA. |
| PORPHYRIOS | • porphyrios n. Plural of porphyrio. • PORPHYRIO n. any bird of the purple-coot genus Porphyrio. |
| PORPHYROID | • porphyroid n. (Mineralogy) A crystalline and schistose rock containing porphyritic crystals of feldspar. • PORPHYROID n. a metamorphic rock having a texture characterized by large crystals set in a finer groundmass. |
| PORPHYROUS | • porphyrous adj. Of or crafted from porphyry. • porphyrous adj. Of purple hue, like that of porphyry. • PORPHYROUS adj. purple. |
| PYORRHOEAL | • pyorrhoeal adj. Relating to pyorrhoea. • pyorrhœal adj. Obsolete form of pyorrheal. • PYORRHOEAL adj. relating to pyorrhoea, suppuration in the sockets of the teeth, also PYORRHEAL, PYORRHEIC, PYORRHOEIC. |
| PYORRHOEAS | • pyorrhoeas n. Plural of pyorrhoea. • PYORRHOEA n. suppuration in the sockets of the teeth, also PYORRHEA. |
| PYORRHOEIC | • pyorrhoeic adj. Alternative form of pyorrheic. • pyorrhœic adj. Obsolete form of pyorrheic. • PYORRHOEIC adj. relating to pyorrhoea, suppuration in the sockets of the teeth, also PYORRHEAL, PYORRHEIC, PYORRHOEAL. |
| PYROPHORIC | • pyrophoric adj. Spontaneously igniting in air, especially when in a finely divided state. • pyrophoric adj. Producing sparks, especially by friction. • pyrophoric adj. (Fire investigation) Able to oxidize with exposure to atmospheric oxygen at normal temperatures. |
| PYROPHORUS | • pyrophorus n. A substance capable of taking fire spontaneously on exposure to the air, especially in a finely divided state. • Pyrophorus prop.n. A taxonomic genus within the family Elateridae – fire beetles, bioluminescent click beetles. • PYROPHORUS n. any substance capable of igniting spontaneously on exposure to air. |