rivulus
— Noun
– English
～ found in small streams of tropical America; often kept in aquariums; usually hermaphroditic
Riyadh
— Noun
– English
～ joint capital (with Mecca) of Saudi Arabia located in the central oasis; largest city in Saudi Arabia
riyal-omani
— Noun
– English
～ the basic unit of money in Oman
riyal
— Noun
– English
～ the basic unit of money in Qatar
riyal
— Noun
– English
～ the basic unit of money in Saudi Arabia
RN
— Noun
– English
～ a graduate nurse who has passed examinations for registration
rn
— Noun
– English
～ a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health
rna
— Noun
– English
～ (biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes; it transmits genetic information from DNA to the cytoplasm and controls certain chemical processes in the cell; "ribonucleic acid is the genetic material of some viruses"
RNA polymerase
— Noun
– English
～ the enzyme that copies DNA into RNA
RNase
— Noun
– English
～ a transferase that catalyzes the hydrolysis of ribonucleic acid
Ro
— Noun
– English
～ an artificial language for international use that rejects all existing words and is based instead on an abstract analysis of ideas
roach
— Noun
– English
～ the butt of a marijuana cigarette
roach
— Noun
– English
～ a roll of hair brushed back from the forehead
roach holder
— Noun
– English
～ metal tweezers used by marijuana smokers to hold a roach
roach
— Noun
– English
～ European freshwater food fish having a greenish back
roach
— Noun
– English
～ street names for flunitrazepan
roach
— Noun
– English
～ any of numerous chiefly nocturnal insects; some are domestic pests