Pyrenomycetes
— Navneord
– Engelsk
～ class of fungi in which the fruiting body is a perithecium; includes powdery mildews and ergot and Neurospora
Pyrethrum
— Navneord
– Engelsk
～ used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum
pyrethrum
— Navneord
– Engelsk
～ made of dried flower heads of pyrethrum plants
pyrethrum
— Navneord
– Engelsk
～ spring-flowering garden perennial of Asiatic origin having finely divided aromatic leaves and white to pink-purple flowers; source of an insecticide; sometimes placed in genus Chrysanthemum
pyrethrum
— Navneord
– Engelsk
～ white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum
Pyrex
— Navneord
– Engelsk
～ a borosilicate glass with a low coefficient of expansion; used for heat-resistant glassware in cooking and chemistry
pyrexia
— Navneord
– Engelsk
～ a rise in the temperature of the body; frequently a symptom of infection
pyridine
— Navneord
– Engelsk
～ a toxic colorless flammable liquid organic base with a disagreeable odor; usually derived from coal
Pyridium
— Navneord
– Engelsk
～ analgesic (trade name Pyridium) used to treat urinary tract infections
pyridoxal
— Navneord
– Engelsk
～ a B vitamin that is essential for metabolism of amino acids and starch
pyridoxamine
— Navneord
– Engelsk
～ a B vitamin that is essential for metabolism of amino acids and starch
pyridoxine
— Navneord
– Engelsk
～ a B vitamin that is essential for metabolism of amino acids and starch
pyriform lobe
— Navneord
– Engelsk
～ pear-shaped neural structure on either side of the brain in the rhinencephalon
pyriform area
— Navneord
– Engelsk
～ pear-shaped neural structure on either side of the brain in the rhinencephalon
pyrilamine
— Navneord
– Engelsk
～ antihistamine used to treat rhinitis and pruritus
pyrimidine
— Navneord
– Engelsk
～ any of several basic compounds derived from pyrimidine
pyrimidine
— Navneord
– Engelsk
～ a heterocyclic organic compound with a penetrating odor
pyrite
— Navneord
– Engelsk
～ a common mineral (iron disulfide) that has a pale yellow color
pyrites
— Navneord
– Engelsk
～ any of various metallic-looking sulfides (of which pyrite is the commonest)
pyrocellulose
— Navneord
– Engelsk
～ nitrocellulose containing less nitrogen than guncotton; used in making smokeless powder