All articles starting with R

Rebar

Rebar, short for reinforcing bar and also called reinforcing steel, is a steel bar embedded in concrete to carry tensile loads, used in bridges, buildings, and foundations.

Rebate (marketing)

A mail-in rebate is a partial refund claimed after purchase by mailing a form, receipt, and UPC bar code; many buyers never claim, so firms sell at two prices.

Rebaudioside A (Reb A, rebiana), a steviol glycoside from Stevia rebaudiana leaves, is a zero-calorie sweetener 200-300 times sweeter than sucrose, less bitter than stevioside, with JECFA/EFSA ADI 4 mg/kg as steviol.

Rebaudioside B

Rebaudioside B (Reb B) is a minor steviol glycoside sweetener from Stevia rebaudiana leaves, hydrolyzed to steviol like rebaudioside A, with slow-onset sweetness, poor solubility, and FDA GRAS status via GRN 968 (2022).

Rebaudioside C

Rebaudioside C (Reb C, dulcoside B), a rhamnose-containing steviol glycoside from Stevia rebaudiana leaves, discovered 1977; third most abundant leaf glycoside, FEMA 4720, FDA GRAS via GRN 536 (2015), JECFA ADI 0-4 mg/kg bw as steviol.

Rebaudioside D

Rebaudioside D (Reb D) is a minor steviol glycoside sweetener from Stevia rebaudiana, 200–300 times sweeter than sucrose, made commercially by enzymatic bioconversion of rebaudioside A and an intermediate in rebaudioside M production.

Rebaudioside E

Rebaudioside E (Reb E), a minor steviol glycoside sweetener from Stevia rebaudiana, isomer of rebaudioside A, metabolized to steviol; GRAS via FDA GRN 823 (Blue California, 2019).

Rebaudioside I

Rebaudioside I (Reb I) is a pentaglycosylated steviol glycoside sweetener from Stevia rebaudiana, made by enzymatic bioconversion of rebaudioside A; FDA issued no-questions letters on GRNs 911, 1106, and 1178.

Rebaudioside M

Rebaudioside M (Reb M), a steviol glycoside sweetener from Stevia rebaudiana, 200-350 times sweeter than sucrose with a sugar-like taste; produced by fermentation or enzymatic conversion due to 0.01% natural abundance.

Rebaudioside M2

Rebaudioside M2 (CAS 1638974-11-4) is a steviol glycoside sweetener, the Glcβ(1-6)-linked isomer of rebaudioside M, made enzymatically from rebaudioside A by engineered E. coli; FDA issued a no-questions GRAS letter (GRN 1203) in February 2025.

Rebbie Jackson

Rebbie Jackson (Maureen Reillette Jackson-Brown, born 1950) is the eldest Jackson sibling, an American R&B singer whose 1984 Michael Jackson-produced hit "Centipede" reached #4 R&B and #24 Hot 100 across four studio albums.

Oct 15, 2026

REBCO coated conductor

A REBCO coated conductor is a second-generation high-temperature superconducting tape, a thin rare-earth barium copper oxide film on flexible metal, used chiefly in compact fusion magnets.

Oct 22, 2026

REBCO high-temperature superconducting magnet

A REBCO high-temperature superconducting magnet is an electromagnet wound from rare-earth barium copper oxide tape, which superconducts near 92 K and can operate above 20 tesla.

Rebeca Andrade

Rebeca Andrade (Rebeca Rodrigues de Andrade), Brazilian artistic gymnast born 1999 in Guarulhos; two-time Olympic gold medalist (Tokyo vault, Paris floor), 2022 world all-around champion, and Brazil's most decorated Olympian with six medals.

Rebeca Bat-Sheba Rosengaus-Nurko

Rebeca Bat-Sheba Rosengaus-Nurko is an entomologist and evolutionary biologist, Associate Professor Emerita at Northeastern University, who proposed that pathogens drove insect sociality and won a 2005 PECASE award.

Rebecca (1940 film)

Rebecca (1940) is Alfred Hitchcock's first American film, a gothic romance adapted from Daphne du Maurier's 1938 novel, produced by David O. Selznick, starring Laurence Olivier and Joan Fontaine, and winner of the Best Picture and Best Cinematography Oscars.

Rebecca (2020 film)

Rebecca (2020) is Ben Wheatley's Netflix and Working Title adaptation of Daphne du Maurier's 1938 gothic novel, starring Lily James, Armie Hammer, and Kristin Scott Thomas, released October 21, 2020, distinct from Hitchcock's 1940 Best Picture winner.

Rebecca (novel)

Rebecca (1938) is Daphne du Maurier's Gothic novel of an unnamed second Mrs de Winter at Manderley, haunted by Maxim's dead first wife; also known via Hitchcock's 1940 film and the 2020 Netflix adaptation.

Rebecca (רִבְקָה)

Rebecca (רִבְקָה, Rivqah), also spelled Rebekah, is the second matriarch of Israel in the Book of Genesis: the wife of Isaac, mother of Jacob and Esau, and daughter of Bethuel.

Rebecca (レベッカ) (Cyberpunk: Edgerunners)

Rebecca (レベッカ) is a trigger-happy solo mercenary and Pilar's sister in Cyberpunk: Edgerunners, the 2022 Studio Trigger anime. Added over CD Projekt Red's objections, she died crushed by Adam Smasher and became the show's fan favorite.

Oct 10, 2026

Rebecca A Brachman

Rebecca A. Brachman is a neuroscientist who trained at Columbia University, known for prophylactic ketamine, a strategy to prevent depression and PTSD before stress occurs, and for co-founding IMPRINT.

Rebecca Adlington

Rebecca (Becky) Adlington, British swimmer born 1989 in Mansfield; won 400m and 800m freestyle gold at Beijing 2008 with an 8:14.10 800m world record, plus two bronzes at London 2012; retired 2013.

Rebecca Alpert

Rebecca T. Alpert is an American Reconstructionist rabbi ordained in 1976, among the first women rabbis in America, and later one of the first openly lesbian rabbis.

Rebecca Alty

Rebecca Alty is a Canadian Liberal politician and Minister of Crown-Indigenous Relations, elected in 2025 as the Northwest Territories' MP after serving as mayor of Yellowknife from 2018 to 2025.

Rebecca Anne Seguin-Fowler

Rebecca Anne Seguin-Fowler is an American registered dietitian and public health scientist at Texas A&M whose community nutrition and physical activity programs for rural populations earned her election to the National Academy of Medicine in 2023.

Rebecca B. Smith

Rebecca B. Smith, also known as Rebecca Beach Smith, is an American jurist serving as a United States district judge for the Eastern District of Virginia since 1989.

Rebecca Bauer-Kahan

Rebecca Bauer-Kahan is an American Democratic politician and attorney first elected in 2018 to represent California's 16th Assembly district, where she chairs the Committee on Privacy and Consumer Protection.

Rebecca Bennett (New Jersey politician)

Rebecca Bennett is an American politician and Democratic nominee for the U.S. House in New Jersey's 7th District, facing Republican incumbent Tom Kean, Jr. in 2026.

Rebecca Black

Rebecca Black, American singer-songwriter and DJ born 1997 in Irvine, California; viral at 13 with 2011's "Friday"; later albums Let Her Burn, SALVATION, and Age of the Exhibitionist.