R

R arginine; organic radical; rate; electrical resistance; respiration; rhythm; right; roentgen.

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R /R / resistance (def. 3).

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r ring chromosome.

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R

abbr.

1. right

2. radical (usually an alkyl or aryl group)

3. respiration

4. respiratory exchange ratio

5. or r roentgen

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or R

abbr.

Latin recipe (take)

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The Greek letter rho. Entries beginning with this character are alphabetized under rho.

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r

abbr.

racemic

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R

symbol, roentgen; a symbol used in general chemical formulae to represent an organic radical; Rankine (scale); Réaumur (scale); [L.] remotum (far); respiration; Rickettsia; right.

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r

symbol for ring chromosome.