Lexic.us

Definition of R

1. Noun. A unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air.

2. Noun. (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole.

3. Noun. The 18th letter of the Roman alphabet.

4. Noun. The length of a line segment between the center and circumference of a circle or sphere.

Medical Definition of R

1. Commonly used abbreviation for respiration(s). For example, in a medical chart, you might see scrawled bp90/60 t98.6 hr 60/reg r15 , which is short hand signifying that the blood pressure is 90/60 mm hg, the temperature (t) is 98.6 degrees fahrenheit, the heart rate (hr) is 60/min and regular, and the respirations (r) 15/min. (this example would be entirely normal for an adult or older child). Symbol for a ring chromosome, a structurally abnormal chromosome in which the end of each chromosome arm has been lost and the broken arms have been reunited in ring formation. (12 Dec 1998)

Lexicographical Neighbors of R

qwertys QWERTY keyboard Q angle q arm Q bands q beta phage q beta replicase Q disks Q enzyme Q fever

Q fever q in population genetics Q tip test Q wave r (current term) r (current term) R-2 R-banding R-banding stain R-on-T phenomenon

R-R interval r.c. R. B. Cattell R. Buckminster Fuller R. J. Mitchell R17 bacteriophage Ra Ra raash Rab28 GTPase

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