All articles starting with R
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Riccardo Tisci
Riccardo Tisci (born 1974) is an Italian fashion designer, creative director of Givenchy 2005-2017 and Burberry chief creative officer 2018-2022, known for Gothic-Catholic couture fused with streetwear, the rottweiler and Bambi Givenchy T-shirts, Madonna's 2012 Super Bowl costumes, and Watch the Throne artwork.
Riccardo Wittek
Riccardo Wittek (1944–2008) was a Swiss virologist and professor of general and molecular virology at the University of Lausanne, known for work on vaccinia virus and WHO biosafety guidelines.
Riccardo Zacconi
Riccardo Zacconi is an Italian business executive who co-founded King, the mobile games company behind Candy Crush Saga, in 2003 and served as its chief executive for sixteen years.
Riccati equation
The Riccati equation is a first-order ordinary differential equation, quadratic in the unknown function, named for the Venetian mathematician Jacopo Riccati and published in 1724.
Ricchi e Poveri
Ricchi e Poveri, Italian pop vocal group formed in Genoa in 1967 (Franco Gatti, Angela Brambati, Marina Occhiena, Angelo Sotgiu), named by Franco Califano; Sanremo winners 1985 with "Se m'innamoro", 22 million records, now a duo.
Ricci curvature
Ricci curvature, also called the Ricci tensor, is a geometric quantity on a Riemannian manifold measuring how volumes change, introduced by Gregorio Ricci-Curbastro in 1904.
Ricci flow
Ricci flow is a geometric evolution equation introduced by Richard Hamilton in 1982 that smooths a manifold's metric, and underlies Perelman's proof of the Poincaré conjecture.
Ricci Luyties
Ricci Luyties is an American former volleyball player and coach who won a 1988 Olympic gold medal as the US men's setter, after starting on four UCLA championship teams.
Ricci soliton
A Ricci soliton is a self-similar solution of the Ricci flow whose metric changes only by scaling and diffeomorphisms, generalizing Einstein metrics and modeling singularities.
Riccia fluitans
Riccia fluitans, floating crystalwort, is a thallose aquatic liverwort (Ricciaceae) that floats in mats worldwide, switches between water and land forms regulated by abscisic acid, favors eutrophic waters, and is a popular aquarium plant.
Riccioli (lunar crater)
Riccioli is a 139 km pre-Nectarian impact crater on the Moon's west limb near the equator, named for the Jesuit astronomer whose 1651 map founded lunar nomenclature; it shows Orientale ejecta, fractures, and mare fill.
Riccius (lunar crater)
Riccius is a lunar impact crater about 72 km across, located at 37° south latitude in the Moon's southern highlands and named for the Italian astronomer Augustine Riccius.
Ricco Groß
Ricco Groß, a German former biathlete born in 1970, achieved nine world championship titles and four Olympic gold medals in the men's relay between 1990 and 2007.
Rice
Rice (Oryza sativa), annual grass staple for over half the world's people; japonica domesticated in the Yangtze valley ~11,000 BP, indica via japonica introgression; 552.5 Mt milled output forecast 2026/27.
RICE (medicine)
RICE (rest, ice, compression, elevation) is a first-aid mnemonic for acute soft-tissue injuries coined by Gabe Mirkin in 1978; evidence reviews find little support, and successors POLICE and PEACE & LOVE have largely replaced it.
Rice blast
Rice blast is a serious fungal disease of rice caused by the fungus Magnaporthe oryzae, which destroys an estimated 5% of annual global rice production.
Rice bran extract
Rice bran extract is a water-extracted ingredient from rice bran used as a moisture retention agent and sodium phosphate alternative in processed meats, GRAS under FDA GRN 884 (Florida Food Products, closed August 2020) at up to 1.25% by weight.
Rice bran fiber
Rice bran fiber, a concentrated dietary fiber mechanically isolated from defatted rice bran; GRAS in the US under FDA GRN 373 (CJ America, 2011, no-questions letter) for food use excluding meat and poultry.
Rice bran oil
Rice bran oil (RBO, rice oil) is an edible oil from the bran of Oryza sativa, rich in gamma-oryzanol and vitamin E, requiring bran stabilization against lipase, refined physically, and shown in meta-analyses to lower LDL and total cholesterol.
Rice bran wax
Rice bran wax, a vegetable wax from rice milling byproduct, is a US-approved food additive (21 CFR 172.890) used as candy and produce coating, gum plasticizer, and oil gelling agent; FDA had no questions on GRN 720.
Rice cake
A rice cake is either a chewy Asian cake such as Korean tteok, Japanese mochi, or Chinese nian gao, or the Western puffed snack marketed as a low-calorie food.
Rice cooker
Rice cooker (炊飯器, automatic electric rice cooker): countertop appliance cooking rice by absorption and switching to keep-warm automatically. First electric model 1923 (Mitsubishi, marine use); first automatic home model Toshiba ER-4, 1955; tiers are mechanical, micom/fuzzy logic, induction heating, and pressure-IH.
Rice field art
Rice field art (tanbo art, 田んぼアート): images grown in rice paddies by planting colored-leaf rice varieties, originating 1993 in Inakadate Village, Aomori, Japan; perspective-corrected designs viewed from platforms, Gyoda holds the 2.8-hectare world record.
Rice flour
Rice flour, also known as rice powder, is flour ground from milled rice. Prized as gluten-free, hypoallergenic, and bland, it is the most common flour in gluten-free bread.
Rice hull fiber
Rice hull fiber, also called rice husk fiber, is a gluten-free insoluble dietary fiber ingredient from the outer hull of paddy rice, over 91% total dietary fiber, GRAS via FDA GRN 478 (SunOpta, 2013-2015) and used in bakery, cereals, and snacks.
Rice husk
Rice husk (rice hull) is the outer shell of the rice grain, removed during milling and widely burned as biomass fuel or used for silica.
Rice husk ash
Rice husk ash (RHA) is the silica-rich residue left after burning rice husk, used since the late 1960s as a lower-carbon partial replacement for Portland cement in concrete.
Rice Krispies
Rice Krispies (Rice Bubbles) is Kellogg's toasted puffed-rice breakfast cereal, launched 1928, famous for Snap, Crackle, Pop mascots (1933) and Rice Krispies Treats; now under WK Kellogg Co, being acquired by Ferrero in 2025.
Rice Lake (Ontario)
Rice Lake is a warm, shallow lake in southern Ontario, about 30 kilometers long, named for the wild rice that once grew there and home to the ancient Serpent Mounds.
Rice Law
The Rice Law (米穀法) was a 1921 Japanese statute, Law No. 36, authorizing the government to buy, sell, and store rice, enacted after the Rice Riots of 1918.