<B>ribonucleic acid,</B><DL COMPACT><DD> a complex chemical compound, a nucleic acid, found in the cytoplasm and sometimes in the nuclei of all living cells. It consists of long chains of repeating units of ribose combined with phosphoric acid and several chemical bases; ribose nucleic acid. Ribonucleic acid plays an important part in making proteins and in genetic transmission. <BR> <I>Ex. A second type of large molecule, ribonucleic acid (RNA), carries the instructions from the genes to the building sites, where it directs the assembly of proteins (Scientific American).</I> </DL>
<A NAME="ribonucleoprotein">
<B>ribonucleoprotein, </B>noun.<DL COMPACT><DD> a nucleoprotein containing a portion of ribonucleic acid. (Abbr:) RNP </DL>
<A NAME="ribonucleoside">
<B>ribonucleoside, </B>noun.<DL COMPACT><DD> a nucleoside with ribose as its sugar. </DL>
<A NAME="ribonucleotide">
<B>ribonucleotide, </B>noun.<DL COMPACT><DD> a nucleotide containing ribose as its sugar. </DL>
<A NAME="ribose">
<B>ribose, </B>noun.<DL COMPACT><DD> a pentose sugar present in all plant and animal cells and obtained in the dextrorotatory form chiefly from nucleic acids contained in plants. <BR> <I>Ex. Ribose is a sugar formed of five carbon atoms to the molecule, instead of the six that make up the more familiar glucose (Science News Letter).</I> </DL>
<B>ribosomal, </B>adjective.<DL COMPACT><DD> of or having to do with a ribosome or ribosomes. </DL>
<A NAME="ribosomalrna">
<B>ribosomal RNA,</B><DL COMPACT><DD> a ribonucleic acid that is a basic part of the structure of the ribosomes. </DL>
<A NAME="ribosome">
<B>ribosome, </B>noun.<DL COMPACT><DD> any of the granular particles consisting largely of ribonucleic acid that are found in the cytoplasm of cells and carry out the synthesis of protein and enzymes. </DL>
<A NAME="ribozyme">
<B>ribozyme, </B>noun.<DL COMPACT><DD> a segment of RNA that acts as an enzyme by causing chemical reactions in a cell without being changed or consumed in the process. <BR> <I>Ex. [Sidney Altman] was able to establish certain catalytic RNA segments that became known as ribozymes (G. A. Cheney).</I> </DL>
<A NAME="ribroast">
<B>rib roast,</B><DL COMPACT><DD> a cut of beef including a part of one or more ribs, suitable for roasting. </DL>
<A NAME="ribtickler">
<B>rib-tickler, </B>noun.<DL COMPACT><DD> (Informal.) a funny story or joke. </DL>
<B>rib twist,</B><DL COMPACT><DD> a twist formed in glassware, by cutting a stem and twisting it to form spiral grooves. </DL>
<A NAME="ribtwisted">
<B>rib-twisted, </B>adjective.<DL COMPACT><DD> formed with a rib twist. </DL>
<A NAME="ribwort">
<B>ribwort, </B>noun, or <B>ribwort plantain,</B><DL COMPACT><DD><B> 1. </B>a plantain having long, narrow leaves with prominent ribs; narrow-leaf plantain. <DD><B> 2. </B>any one of certain similar plantains. </DL>
<A NAME="ricardian">
<B>Ricardian, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> of or having to do with the theories of the English political economist David Ricardo (1772-1823) or his followers. <DD><I>noun </I> a follower of Ricardo. </DL>
<A NAME="rice">
<B>rice, </B>noun, verb, <B>riced,</B> <B>ricing.</B><DL COMPACT><DD><I>noun </I> <B>1. </B>the starchy seeds or grain of a plant grown in warm climates. Rice is one of the most important foods of the world. <DD><B> 2. </B>the plant itself. Rice is a kind of grass. <DD><I>v.t. </I> to reduce to a form like rice. <BR> <I>Ex. to rice potatoes.</I> </DL>
<B>rice bowl,</B><DL COMPACT><DD> an area where rice is grown extensively. <BR> <I>Ex. French Indo-China was once known as the rice bowl of the world (New Yorker).</I> </DL>
<A NAME="ricebran">
<B>rice bran,</B><DL COMPACT><DD> the separated cuticle of the rice grain. </DL>
<A NAME="riceflour">
<B>rice flour,</B><DL COMPACT><DD><B> 1. </B>ground rice, used especially in making puddings, cakes, and face powder. <DD><B> 2. </B>the layer of the rice kernel next to the cuticle, rubbed off as a powder in the processes of hulling and polishing. </DL>
<A NAME="ricegrub">
<B>rice grub,</B><DL COMPACT><DD> the larva of a scarabaeid beetle that damages the roots of upland rice in the southern United States. </DL>
<A NAME="ricepaper">
<B>rice paper,</B><DL COMPACT><DD><B> 1. </B>a thin paper made from the straw of rice. <DD><B> 2. </B>a paper made from the pith of the rice-paper plant or of certain other plants. </DL>
<A NAME="ricepaperplant">
<B>rice-paper plant</B> or <B>tree,</B><DL COMPACT><DD> a small tree or shrub of Asia, belonging to the ginseng family, from whose pith rice paper is made. The rice-paper plant has greenish flowers and large, spreading leaves, for which it is often grown as an ornamental. </DL>
<A NAME="ricer">
<B>ricer, </B>noun.<DL COMPACT><DD> a utensil for ricing cooked potatoes and other foods, by pressing them through small holes. </DL>
<A NAME="ricerat">
<B>rice rat,</B><DL COMPACT><DD> a gray or brownish rat of the southern United States and Mexico, found especially in wet, grassy areas. </DL>
<B>ricercare, </B>noun, pl. <B>-ri.</B><DL COMPACT><DD> (Music.) <DD><B> 1. </B>a fugue using contrapuntal devices. <BR> <I>Ex. He had arranged the movements in an order which started with the three part ricercare on the royal theme (London Times).</I> <DD><B> 2. </B>an early form of the fugue, somewhat similar to a motet, but instrumental. </DL>
<A NAME="riceweevil">
<B>rice weevil,</B><DL COMPACT><DD> a beetle which feeds on rice and other grains. It is found in all parts of the world. </DL>
<A NAME="ricewine">
<B>rice wine,</B><DL COMPACT><DD> an alcoholic beverage made from fermented rice, popular in Japan; sake. </DL>
<A NAME="rich">
<B>rich, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> <B>1. </B>having much money, land, goods, or other property. <BR> <I>Ex. Henry Ford and John D. Rockefeller were rich men.</I> <DD><B> 2. </B>well supplied; abounding. <BR> <I>Ex. The United States is rich in oil and coal. (Figurative.) All this part of the river is rich in Indian history and traditions (Mark Twain).</I> <DD><B> 3. </B>abundant. <BR> <I>Ex. a rich supply.</I> <DD><B> 4. </B>producing or yielding much; fertile. <BR> <I>Ex. rich soil, a rich mine.</I> (SYN) productive, fruitful, fecund. <DD><B> 5. </B>having great worth; valuable. <BR> <I>Ex. a rich harvest, a rich virtue.</I> <DD><B> 6. </B>costly; elegant. <BR> <I>Ex. rich dresses, rich jewels, rich carpets.</I> (SYN) expensive, sumptuous, luxurious. <DD><B> 7a. </B>containing plenty of butter, eggs, flavoring, sugar, and the like. <BR> <I>Ex. a rich fruit cake, rich milk.</I> <DD><B> b. </B>having many desirable elements or qualities. <DD><B> 8. </B>deep; full; vivid. <BR> <I>Ex. a rich red, a rich tone.</I> <DD><B> 9. </B>strong and finely flavored. <BR> <I>Ex. a rich, mellow sherry.</I> <DD><B> 10. </B>containing more fuel and less air than is normally required. <BR> <I>Ex. a rich fuel mixture.</I> <DD><B> 11. </B>(Informal.) <DD><B> a. </B>very amusing. <DD><B> b. </B>ridiculous; absurd. <DD><B> 12. </B>great, thorough, or fine. <BR> <I>Ex. A couple of boys left to themselves will furnish richer fun than any troop of trained comedians (George Meredith).</I> <DD><I>noun </I> <B>the rich,</B> rich people. <BR> <I>Ex. The rich ... do not, in general, require to be so much stimulated to benevolence (Scott).</I> <BR><I>expr. <B>strike it rich,</B> (U.S. Informal.) <DD><B> a. </B>to find rich ore, oil, or other mineral. </I> <I>Ex. After three months of drilling in the desert, the prospectors struck it rich.</I> <DD><B> b. </B>(Figurative.) to have a sudden or unexpected great success. <BR> <I>Ex. The gaffer happens to be the head stableman on the opulent country estate of a former longshoreman who has struck it rich (New Yorker).</I> noun <B>richness.</B> </DL>
<A NAME="rich">
<B>Rich.,</B><DL COMPACT><DD> Richard. </DL>
<A NAME="richardroe">
<B>Richard Roe,</B><DL COMPACT><DD> a fictitious name used in legal forms or proceedings for the name of an unknown person. </DL>
<A NAME="richardsonsgoose">
Richardson's goose, =Hutchins' goose.</DL>
<A NAME="richardsonsowl">
<B>Richardson's owl,</B><DL COMPACT><DD> a small, brown and white owl resembling the saw-whet owl, occurring in Canada and occasionally during the winter in the northern United States. </DL>
<A NAME="richen">
<B>richen, </B>transitive verb, intransitive verb.<DL COMPACT><DD> to make or become rich or richer. </DL>
<A NAME="riches">
<B>riches, </B>noun pl.<DL COMPACT><DD> wealth; abundance of property; much money, land, or goods. <BR> <I>Ex. to rise from rags to riches.</I> (SYN) affluence, opulence. </DL>
<A NAME="richling">
<B>richling, </B>noun.<DL COMPACT><DD> a rich person. </DL>
<A NAME="richly">
<B>richly, </B>adverb.<DL COMPACT><DD><B> 1. </B>in a rich manner. <BR> <I>Ex. storied windows richly light (Milton).</I> <DD><B> 2. </B>fully. <BR> <I>Ex. a richly deserved punishment.</I> </DL>
<A NAME="richrhyme">
<B>rich rhyme,</B> =perfect rhyme.</DL>
<A NAME="richterscale">
<B>Richter scale,</B><DL COMPACT><DD> a scale for indicating the magnitude of earthquakes, using numbers from 1 upwards, with 1.5 measuring slight seismic disturbances, 4.5 measuring potentially destructive earthquakes, and from 8.5 up measuring major earthquakes. <BR> <I>Ex. The record was broken when Aug. 19 passed without the recording of any tremor of magnitude eight or more on the Richter scale striking U.S. territory (Science News).</I> </DL>
<A NAME="richweed">
<B>richweed, </B>noun.<DL COMPACT><DD><B> 1. </B>a common urticaceous herb of North America and Japan. <DD><B> 2. </B>a plant of the mint family of eastern North America, used medicinally especially as a diuretic and tonic. <DD><B> 3. </B>any one of several ragweeds. </DL>
<A NAME="ricin">
<B>ricin, </B>noun.<DL COMPACT><DD> a poisonous albumin found in castor-oil seeds. </DL>
<A NAME="ricinoleate">
<B>ricinoleate, </B>noun.<DL COMPACT><DD> a salt or ester of ricinoleic acid. </DL>
<A NAME="ricinoleicacid">
<B>ricinoleic acid,</B><DL COMPACT><DD> an unsaturated, fatty hydroxy acid obtained from castor oil. </DL>
<A NAME="ricinolein">
<B>ricinolein, </B>noun.<DL COMPACT><DD> the glycerol ester of ricinoleic acid. It makes up about 80 per cent of castor oil. </DL>
