A trademark for a movie rating indicating that admission will be granted only to persons of or over a certain age, usually 17, unless accompanied by a parent or guardian. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
R 2
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Tweet 1. The symbol for gas constant. 2. The symbol for a hydrocarbon side chain or substituent of variable chemical structure. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
r 2
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Tweet abbr. 1. Mathematics radius 2. Genetics recombinant 3. or R Electricity resistance |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
R 3
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Tweet abbr. 1. range (surveying) 2. Réaumur (scale) 3. registered trademark 4. Republican 5. Ecclesiastical response 6. right 7. or r roentgen 8. rook (chess) 9. Baseball run |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
R.
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Tweet abbr. 1. rabbi 2. rector 3. river |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
r.
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Tweet abbr. 1. rare 2. retired 3. rod (unit of length) 4. ruble 5. rupee |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.