Back
English Dictionary
Learn English
Learn grammar
List of words
Study your cards
Hang On, Man!
Audio Books
More apps
SPONSORED LINKS
Recent searches
sordid
canal
frill
SPONSORED LINKS
SPONSORED LINKS
convalescence
xyridales
abdicator
iodide
plot
anywhere
accent mark
Hide translation
r
r
/ˈɑːr/
noun
The length of a line segment between the center and circumference of a circle or sphere
(
r
,
radius
)
the length of a line segment between the center and circumference of a circle or sphere
The radius of the circle was measured to be 5cm
The radius of the circle was measured to be 5cm
R
The 18th letter of the Roman alphabet
(
R
)
the 18th letter of the Roman alphabet
(physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
(
gas constant
,
R
,
universal gas constant
)
(physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
A unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
(
R
,
roentgen
,
röntgen
)
a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
Back
Next
Language