All articles starting with B

Buttock augmentation

Buttock augmentation (gluteal augmentation, gluteoplasty; Brazilian butt lift for fat grafting) is cosmetic surgery enlarging the buttocks with silicone implants or autologous fat transfer; implants show roughly 21-25% complication rates versus 10-13% for fat grafting, which carries fat embolism risk addressed by multi-society safety guidelines.

Buttock cleavage

Buttock cleavage, also called plumber's crack or builder's bum, is minor exposure of the buttocks and intergluteal cleft, typically from low-rise pants; defined by McQueen's 1993 bumster trouser and recurring fashion revivals.

Buttocks

Buttocks: the posterior pelvic prominences formed mainly by the gluteus maximus, medius, and minimus muscles. Key facts: gluteus maximus provides shape and hip extension; injections go in the upper outer quadrant; prominence is uniquely human.

Button

A button is a small disc-shaped fastener, made of firm or somewhat yielding material, that passes through a buttonhole or loop to fasten clothing shut.

Button cell

A button cell, also called a coin cell or coin battery, is a small round battery shaped like a button, used in watches, hearing aids, and calculators.

Sep 29, 2026

Button fixation

Button fixation is a surgical technique in which a cortical button passed through a bone tunnel holds ligament or tendon grafts, used chiefly in ACL reconstruction.

Button mushroom industry

The button mushroom industry is the commercial food chain around Agaricus bisporus, grown indoors on composted straw and manure, with over 90% of US, Polish, and Dutch mushroom production.

Buttons And Lights

Buttons And Lights: a general game playing planning puzzle (GDL, kif, Ludii DLP.Games.1488) with three buttons and three lights; buttons toggle or swap lights, goal all on within 6 steps, solutions abacba and abcaba.

Buttress dam

A buttress dam, also known as a hollow dam, is a dam in which a thin watertight wall or series of arches is supported by regularly spaced downstream buttresses.

Buttress Hill

Buttress Hill, a flat-topped Antarctic hill about 2,300 ft high with west-facing rock cliffs, overlooks Duse Bay in the northeast Antarctic Peninsula at 63°34'S, 57°03'W; named descriptively by the FIDS after their 1946 survey.

Butuan

Butuan (City of Butuan) is a highly urbanized city in northeastern Mindanao, Philippines, serving as the regional center of Caraga. It is recognized for its ancient trade and balangay boats.

Sep 23, 2026

Butuga II

Butuga II was a tenth-century Western Ganga king under the Rashtrakuta emperor Krishna III, who killed the Chola prince Rajaditya at Takkolam and received provinces that enlarged Ganga territory.

Sep 24, 2026

Buturlin Committee

The Buturlin Committee (Бутурлинский комитет) was a secret body of the Russian Empire, created under Nicholas I in 1848 to supervise printed works already passed by the censors.

Butwāl

Butwāl (बुटवल), Butwal Sub-Metropolitan City, is a city in Rupandehi District, Lumbini Province, Nepal, on the Tinau River at the Mahendra-Siddhartha Highway junction; 194,335 residents (2021 census), former interim Lumbini capital.

Butyl acrylate

Butyl acrylate is the acrylate ester of butanol and acrylic acid, a clear, colorless liquid with a fruity odor used industrially in coatings, adhesives, and textiles.

Butyl cyanoacrylate

Butyl cyanoacrylate, also known as enbucrilate, is a fast-polymerizing cyanoacrylate used in medical adhesives, including Histoacryl skin glue and the Trufill n-BCA liquid embolic system.

Butyl group

The butyl group, −C₄H₉, is a four-carbon alkyl substituent derived from butane by loss of one hydrogen, occurring as n-butyl, sec-butyl, isobutyl, and tert-butyl forms.

Butyl rubber

Butyl rubber, also known as IIR or isobutylene–isoprene rubber, is a synthetic elastomer with very low gas permeability, used mainly in tire inner tubes and innerliners.

Butylate

Butylate (S-ethyl diisobutylthiocarbamate, Sutan) is a volatile thiocarbamate corn herbicide, WSSA group 15, introduced 1962, EPA-registered 1967; usage fell sharply and it is not EU-approved.

Butylated hydroxyanisole

Butylated hydroxyanisole (BHA) is a synthetic phenolic antioxidant used to preserve fats and oils in food, cosmetics, and pharmaceuticals; classified as a possible human carcinogen, it faces an FDA safety reassessment launched in 2026.

Butylated hydroxytoluene

Butylated hydroxytoluene (BHT) is a synthetic phenol used since 1949 as an antioxidant in foods, cosmetics, and plastics, and known in the EU as food additive E 321.

Butylphthalide

Butylphthalide (丁苯酞, NBP, Enbipu) is a Chinese Class 1 neuroprotective drug for mild-to-moderate acute ischemic stroke, derived from celery seed compounds, approved in 2002, dosed 0.2 g three times daily for 20 days.

Butyrate

Butyrate is the anion of butyric acid, a four-carbon fatty acid made by anaerobic gut bacteria from dietary fiber, serving as the colon cells' main energy source.

Butyrate kinase

Butyrate kinase (EC 2.7.2.7, buk) is an ASKHA-family bacterial phosphotransferase that converts butyrate and ATP to butyryl phosphate and ADP, the ATP-yielding terminal step of the Ptb-Buk butyrate synthesis route, uncommon in gut bacteria versus CoA-transferase.