Glossary · Nouns · R
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TermTypeDefinitionClassificationsUpdated
Rib RoastnounMWEa cut of meat, beef or venison, including more than one rib and the meat located along the outside of the ribsverified
Ribavirinnounan inhaled antiviral agent (trade name Virazole) that may be used to treat serious virus infectionsverified
Ribbon FernnounMWEepiphytic fern with straplike usually twisted fronds of tropical Asia and Polynesia and Americaverified
Ribbon TreenounMWEdeciduous New Zealand tree whose inner bark yields a strong fiber that resembles flax and is called New Zealand cottonverified
Ribbon WormnounMWEsoft unsegmented marine worms that have a threadlike proboscis and the ability to stretch and contractverified
Ribbonwoodnounsmall tree or shrub of New Zealand having a profusion of axillary clusters of honey-scented paper-white flowers and whose bark is used for cordageverified
Ribgrassnounan Old World plantain with long narrow ribbed leaves widely established in temperate regionsverified
Ribonucleic AcidnounMWE(biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomesverified
Ribwortnounan Old World plantain with long narrow ribbed leaves widely established in temperate regionsverified
Rice RatnounMWEhardy agile rat of grassy marshes of Mexico and the southeastern United Statesverified
Rice-Grain FritillarynounMWEherb of northwestern America having green-and-purple bell-shaped flowersverified
Richnessnounthe property of producing abundantly and sustaining vigorous and luxuriant growthverified
Richter ScalenounMWEa logarithmic scale of 1 to 10 formerly used to express the magnitude of an earthquake on the basis of the size of seismograph oscillationsverified
Richweednouna plants of the genus Pilea having drooping green flower clusters and smooth translucent stems and leavesverified
Ricketsnounchildhood disease caused by deficiency of vitamin D and sunlight associated with impaired metabolism of calcium and phosphorusverified
Rickettsianounany of a group of very small rod-shaped bacteria that live in biting arthropods (as ticks and mites) and cause disease in vertebrate hostsverified
Rickettsial DiseasenounMWEinfectious disease caused by ticks or mites or body lice infected with rickettsial bacteriaverified
Rickettsialpoxnounmild infectious rickettsial disease caused by a bacterium of the genus Rickettsia transmitted to humans by the bite a mite that lives on rodentsverified
Rickettsiosisnouninfectious disease caused by ticks or mites or body lice infected with rickettsial bacteriaverified
Riddle CanonnounMWEa canon in which the entrances of successive parts were indicated by cryptic symbols and devices (popular in the 15th and 16th centuries)verified
Ridernouna traveler riding in a vehicle (a boat or bus or car or plane or train etc) who is not operating itverified
Rider PlatenounMWEa horizontal beam (or plate) connected to the top of a ship's vertical keel or to the keelsonverified
Riding HabitnounMWEattire that is typically worn by a horseback rider (especially a woman's attire)verified
Rifampinnounan antibacterial drug (trade names Rifadin and Rimactane) used to treat tuberculosisverified
Rifle GrenadenounMWEa grenade that is thrown from a launching device attached to the barrel of a rifleverified
Riflebirdnounvelvety black Australian bird of paradise with green and purple iridescence on head and tailverified