verb (used with object)
to disturb or disquiet greatly in mind; agitate.
to throw into great disorder; derange.
Astronomy. to cause in the orbit of (a celestial body).
verb (transitive; often passive)
to disturb the composure of; trouble
to throw into disorder
(physics, astronomy) to cause (a planet, electron, etc) to undergo a perturbation
late 14c., from Old French perturber “disturb, confuse” (14c.) and directly from Latin perturbare “to confuse, disorder, disturb,” especially of states of the mind, from per- “through” (see per) + turbare “disturb, confuse,” from turba “turmoil, crowd” (see turbid). Related: Perturbed; perturbing.
[per-tuhs-is] /pərˈtʌs ɪs/ noun, Pathology. 1. . /pəˈtʌsɪs/ noun 1. the technical name for whooping cough n. “whooping cough,” 1670s (Sydenham), from Modern Latin pertussis, from per- “thoroughly” + tussis “cough,” of unknown origin. pertussis per·tus·sis (pər-tŭs’ĭs) n. See whooping cough. pertussis (pər-tŭs’ĭs) See whooping cough.
- Pertussis vaccine
pertussis vaccine n. A vaccine containing inactivated Bordetella pertussis bacteria, often used in the diphtheria, tetanus toxoids, and pertussis vaccine to immunize against whooping cough. Also called whooping cough vaccine.
- Pertussis immune globulin
pertussis immune globulin n. A sterile solution of globulins derived from the plasma of adult human donors who have been immunized against and have formed antibodies to pertussis, used in the prevention and treatment of pertussis.
[puh-roo] /pəˈru/ noun 1. Spanish Perú [pe-roo] /pɛˈru/ (Show IPA). a republic in W South America. 496,222 sq. mi. (1,285,215 sq. km). Capital: Lima. 2. a city in N central Indiana. 3. a city in N Illinois. /pəˈruː/ noun 1. a republic in W South America, on the Pacific: the centre of the great Inca […]