R

I

1) chem. chem. radical

2) math. math. ratio

3) biochem. clo regular: a man's suit or coat size

4) sbz restricted: a motion-picture rating advising that children under 17 will not be admitted unless accompanied by an adult

Compare GNC-17 PG PG-13X

5) sbz right

6) phs roentgen

II

symb.

1) the 18th in order or in a series

2) biochem. arginine

3) registered trademark: written as superscript ® following a name registered with the U.S. Patent and Trademark Office

4) elo resistance