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R
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
The length of a line segment between the center and circumference of a circle or sphere
Synonyms:
r; radius
Classified under:
Nouns denoting attributes of people and objects
Hypernyms ("r" is a kind of...):
length (the linear extent in space from one end to the other; the longest dimension of something that is fixed in place)
Hyponyms (each of the following is a kind of "r"):
semidiameter (the apparent radius of a celestial body when viewed as a disc from the earth)
radius of curvature (the radius of the circle of curvature; the absolute value of the reciprocal of the curvature of a curve at a given point)
Holonyms ("r" is a part of...):
diam; diameter (the length of a straight line passing through the center of a circle and connecting two points on the circumference)
Sense 2
Meaning:
The 18th letter of the Roman alphabet
Classified under:
Nouns denoting communicative processes and contents
Hypernyms ("R" is a kind of...):
alphabetic character; letter; letter of the alphabet (the conventional characters of the alphabet used to represent speech)
Holonyms ("R" is a member of...):
Latin alphabet; Roman alphabet (the alphabet evolved by the ancient Romans which serves for writing most of the languages of western Europe)
Sense 3
Meaning:
(physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
Synonyms:
gas constant; R; universal gas constant
Classified under:
Nouns denoting quantities and units of measure
Hypernyms ("R" is a kind of...):
constant (a number representing a quantity assumed to have a fixed value in a specified mathematical context)
Domain category:
natural philosophy; physics (the science of matter and energy and their interactions)
Sense 4
Meaning:
A unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
Synonyms:
R; roentgen
Classified under:
Nouns denoting quantities and units of measure
Hypernyms ("R" is a kind of...):
radioactivity unit (a measure of radioactivity)
Context examples:
Eltrombopag binds to and stimulates the platelet thrombopoietin receptor (TPO-R or CD110), a member of the hematopoietin receptor superfamily.
(Eltrombopag, NCI Thesaurus)
Another substrate of parkin is a GPCR-like protein called Pael-R that accumulates in the ER of affected cells and may cause neuronal cell death.
(Parkinson's Disease Pathway BioCarta, NCI Thesaurus/BIOCARTA)
Vell, your R’yal ’Ighness, it vas like this.
(Rodney Stone, by Sir Arthur Conan Doyle)
Based on the observations, NGTS-1's radius is 0.573±0.077 R☉ (solar radius) and using that value, astronomers calculated its weight to be about 0.598 M☉ (solar mass).
(Astronomers report dwarf star with unexpectedly giant planet, Wikinews)
Write your résumé (that takes weeks to perfect), and check your references so you are ready to push forward in April and the first half of May.
(AstrologyZone.com, by Susan Miller)
Both R(+) and S(-) enantiomers bind to and block alpha 1-adrenergic receptors with equal potency, causing vasodilation and a reduction in peripheral vascular resistance.
(Carvedilol Phosphate Extended-Release Capsule, NCI Thesaurus)
The models enable us to see the wide ranges of conditions that can cause displays to become stuck in the population, evolutionarily, said Maria R. Servedio, an NSF-funded UNC professor and study author.
(For species that mate for life, bonding behaviors provide advantages, National Science Foundation)
The (+) enantiomer has the R and S configuration at C-2, and C-3, respectively.
(Cianidanol, NCI Thesaurus/CRCH)
This is calculated by a mathematical formula that takes into account the R value, K value, angle and maximum amplitude of clot formation.
(Coagulation Index Measurement, NCI Thesaurus)
An electrocardiographic finding suggestive of dextrocardia with situs inversus, characterized by reversal of normal anterior R wave progression and the appearance of reversal of the right and left arm electrodes.
(Dextrocardia by ECG Finding, NCI Thesaurus/CDISC)
