specialized pili found on bacterial cells, similar to F pili and associated with R plasmids.
a thermometer scale in which each degree Réaumur (°R) is 180 of the temperature difference between the freezing point and boiling point of pure water at 1 atm, with 0°R set at the freezing point and 80°R set at the boiling point of water.
curettage of the uterus.
Rønne nasal step
a nasal visual field defect with one margin corresponding to the retinal horizontal medium; seen in glaucoma.
body weight in grams times 100 divided by the cube of height in centimeters.
a test of historical interest: tuberculin, either pure or diluted, is injected intracutaneously into a guinea pig; if the animal is tuberculous, a large papule with a necrotic hemorrhagic center appears in about 24 hours (cocarde or cockade reaction).
a reverse Giemsa chromosome banding method that produces bands complementary to G-bands; induced by treatment with high temperature, low pH, or acridine orange staining; often used together with G-banding on human karyotype to determine whether there are deletions.
a premature ventricular (QRS) complex in the electrocardiogram interrupting the T wave of the preceding beat; often predisposes to serious ventricular arrhythmias.
the time elapsing between two consecutive R waves in the electrocardiogram.
Abbreviation for Royal College of Physicians (of England).
Abbreviation for Royal College of Physicians (Edinburgh).
Symbol for reactivity.
Abbreviation for Royal College of Physicians (Ireland).
Abbreviation for Royal Colleges of Physicians and Surgeons of Canada.
Abbreviation for Royal College of Surgeons (England).
Abbreviation for Royal College of Surgeons (Edinburgh).
Abbreviation for Royal College of Surgeons (Ireland).
Abbreviation for Registered Dental Hygienist.
Abbreviation for Registered Pharmacist.
Abbreviation for respiratory quotient.
Abbreviation for rule out.
Symbol for radium.
Obsolete term for making congruous stepwise cuts on apposing bone surfaces for stability after impaction.
rabbit fibroma virus
a poxvirus of the genus Leporipoxvirus, family Poxviridae, closely related to vaccinia and myxoma viruses, that causes Shope fibroma.
Alternate names: Shope fibroma virus
rabbit myxoma virus
the poxvirus of the genus Leporipoxvirus causing myxomatosis of rabbits.
Alternate names: myxomatosis virus
A rare neuroleptic-induced form of parkinsonism usually manifested as 4–6 Hz, rhythmic discharges involving the jaw, perinasal, and perioral musculature; so-named because the movements mimic those seen with the chewing movements of a rabbit.
an Orthopoxvirus that causes epidemics of pox in laboratory rabbits; immunologically, it is closely related to vaccinia virus but is more virulent in rabbits.