All articles starting with B

BiCuSeO thermoelectrics

BiCuSeO thermoelectrics is the use of bismuth copper oxyselenide, a layered p-type semiconductor of conductive and insulating layers that has reached a figure of merit of 1.5 near 900 K.

Bicuspid aortic valve

A bicuspid aortic valve is a congenital heart defect in which the aortic valve has two leaflets instead of three, the most common congenital cardiac malformation.

Bicycle

A bicycle is a human-powered two-wheeled vehicle steered by handlebars and driven by pedals through a chain, among the most efficient and sustainable means of transportation.

Bicycle and motorcycle dynamics

Bicycle and motorcycle dynamics, also called motorcycle dynamics, is the study of how two-wheeled vehicles balance, steer, and stay stable, explaining countersteering, lean angle, and self-stability.

Bicycle brake

A bicycle brake is a device that slows or stops a bicycle by applying friction to the wheel, most commonly rim, disc, drum, or coaster brakes.

Oct 15, 2026

Bicycle chain

A bicycle chain is a roller chain that transmits pedaling power from the crankset to the rear wheel, with a pitch of 1/2 inch on virtually every bicycle.

Bicycle Day (psychedelic holiday)

Bicycle Day, April 19, commemorates Albert Hofmann's first intentional LSD trip on April 19, 1943, and his bicycle ride home through Basel; founded 1985 by Thomas B. Roberts, distinct from UN World Bicycle Day.

Bicycle drivetrain systems

A bicycle drivetrain is the set of components that transmits pedalling power to the driving wheel, including the chain, derailleurs, cassette, and crankset, with well-maintained systems losing about 4% of power.

Bicycle frame

A bicycle frame, or bike frame, is the main structural assembly of a bicycle, holding the wheels, fork, saddle, and drivetrain in position. The dominant layout since the 1880s is the diamond frame.

Bicycle gearing

Bicycle gearing is the system of gears connecting a bicycle's cranks to its drive wheel, letting riders trade pedal force for wheel speed to keep one cadence across climbs, flats, and descents.

Bicycle helmet

A bicycle helmet, also called a bike helmet, is protective headgear with a crushable foam liner that reduces head and brain injury when a cyclist crashes.

Oct 15, 2026

Bicycle parking rack

A bicycle parking rack is a fixed device that holds bicycles upright and secure while unattended, usually near building entrances and transit stops; recommended designs support the frame at two points.

Bicycle performance

Bicycle performance is the measure of how effectively a bicycle and rider convert human power into speed, from air and rolling resistance to cadence and competition rules.

Bicycle polo

Bicycle polo (cycle polo, bike polo, polo-vélo) is a team sport invented in Ireland in 1891 by Richard J. Mecredy, a 1908 London Olympics demonstration sport won by Ireland, now split into grass and hardcourt versions.

Bicycle Race

Bicycle Race is a 1978 song by Queen, written by Freddie Mercury. It is famous for its cycling lyrics and the promotional nude model race staged at Wimbledon Stadium.

Bicycle Therapeutics

Bicycle Therapeutics is a clinical-stage biopharmaceutical company headquartered in Cambridge, United Kingdom, founded in 2009 on research by Greg Winter and Christian Heinis to develop bicyclic peptide therapeutics for solid tumors.

Bicycle Thieves

Bicycle Thieves (Ladri di biciclette, The Bicycle Thief) is Vittorio De Sica's 1948 Italian neorealist film, written with Cesare Zavattini from Luigi Bartolini's novel, about unemployed Antonio Ricci searching Rome with his son Bruno for a stolen bicycle, and the first Sight & Sound poll's greatest film.

Bicycle-sharing system

A bicycle-sharing system, also called bike-share, is a service making bicycles available for short-term shared public use through docking stations, pioneered by Amsterdam's 1965 White Bicycles and now found worldwide.

Bicycling and feminism

Bicycling and feminism covers the bicycle's role in women's emancipation from the 1890s safety-bike craze, bloomers and Susan B. Anthony's famous claim, to today's cycling gender gap, safety research, and male-dominated bike industry.

Bicyclo[1.1.0]butane strain-release cross-coupling

Bicyclo[1.1.0]butane strain-release cross-coupling is a set of synthetic methods where the central bond of bicyclo[1.1.0]butane is cleaved to form substituted cyclobutanes under nucleophilic, radical, or transition-metal-catalyzed conditions.

Oct 15, 2026

Bicyclo[1.1.1]pentane

Bicyclo[1.1.1]pentane (BCP) is a rigid, highly strained saturated hydrocarbon first synthesized in 1964, now widely used in drug discovery as a bioisostere for benzene rings, alkynes, and tert-butyl groups.

Bicyclol

Bicyclol (双环醇, trade name Baisainuo) is a synthetic hepatoprotective drug developed in China, approved there in 2001, used to lower elevated aminotransferases in chronic hepatitis, fatty liver disease, and drug-induced liver injury.

Bicyclopyrone

Bicyclopyrone, a triketone WSSA Group 27 HPPD-inhibitor herbicide (CAS 352010-68-5) developed by Syngenta, used in corn, cereals, and minor crops at 37.5-50 g ai/ha via Acuron, Talinor, and Storen.

Oct 10, 2026

Bid

Bid refers most prominently to Bid Corporation Limited, known as Bidcorp, a South African-listed broadline foodservice distributor supplying hotels, restaurants, and caterers in 31 countries.

Bid whist

Bid whist: four-player partnership trick-taking card game of the auction whist family, popular among African Americans; 54-card deck, 6-card kitty, uptown/downtown/no-trump bids, books scored above six.

Bida

Bida is a city in Niger State, north-central Nigeria, seat of the Bida Emirate and the Etsu Nupe (Yahaya Abubakar since 2003). Founded mid-19th century as Nupe capital, known for brass, glass, and dyeing crafts.

Bida Emirate

Bida Emirate is a traditional Fulani-ruled emirate in Niger State, central Nigeria, with its capital at the walled town of Bida; it arose when the Nupe kingdom joined the Sokoto Caliphate.

Bidaa Bint Saud

Bidaa Bint Saud is an archaeological site north of Al Ain, United Arab Emirates, with Bronze Age tombs, Iron Age graves, and ancient aflaj irrigation channels.