13-letter words containing a, s, r
- balsam poplar — a poplar tree, Populus balsamifera, of NE North America, having resinous buds and broad heart-shaped leaves
- balsam spruce — either of two North American coniferous trees of the genus Picea, P. pungens (the blue spruce) or P. engelmanni
- balsamiferous — yielding or producing balsam
- baluster stem — a stem of a drinking glass or the like having a gradual swelling near the top or bottom.
- banana spider — a large, yellowish, tropical crab spider (Heteropoda venatoria) occasionally found in bunches of bananas shipped to the Temperate Zones
- banbury tarts — small baked pastries filled with raisins, currants, etc.
- bancassurance — the selling of insurance products by a bank to its customers
- band spectrum — a spectrum consisting of a number of bands of closely spaced lines that are associated with emission or absorption of radiation by molecules
- banderilleros — Plural form of banderillero.
- bandspreading — an additional tuning control in some radio receivers whereby a selected narrow band of frequencies can be spread over a wider frequency band, in order to give finer control of tuning
- banister back — a back of a chair or the like, usually having semicircular spindles between the top rail and the cross rail or seat.
- bank transfer — a payment between two bank accounts
- banker's bill — a banknote
- banking hours — the hours during which a bank is open for business
- bar billiards — a table game in pubs, etc, in which short cues are used to pocket balls into holes scoring various points and guarded by wooden pegs that incur penalties if they are knocked over
- barbados aloe — a tropical aloe, Aloe barbadensis (or A. vera), of the lily family, having clusters of yellow flowers: its juice is used medicinally.
- barbarossa ii — (Khair ed-Din) c1466–1546, Barbary pirate, born in Greece (brother of Barbarossa I).
- barbarousness — The state or quality of being barbarous.
- barbary coast — coastal region of N Africa, extending from Egypt to the Atlantic, inhabited chiefly by Berbers and once (until early 19th cent.) dominated by pirates
- barbary sheep — aoudad
- barber's itch — any of various fungal infections of the bearded portion of the neck and face
- barber's pole — a sign outside a barber's shop consisting of a pole painted with red and white spiral stripes
- barbershopper — a member of a barbershop singing group.
- barcoo salute — a movement of the hand to brush flies away from the face
- barefacedness — The state or quality of being barefaced.
- barley stripe — a disease of barley, characterized by blighted heads and chlorotic, brown, or frayed stripes on the leaves, caused by a fungus, Helminthosporium gramineum.
- barnsbreaking — noisy and exuberant activity; boisterous mischief-making
- baroreceptors — Plural form of baroreceptor.
- barosinusitis — aerosinusitis.
- barred spiral — a spiral galaxy in which the arms originate at the ends of a bar-shaped nucleus
- barrel cactus — any of several large, cylindrical, ribbed, spiny cacti of the genera Echinocactus and Ferocactus.
- barrel-shaped — having the shape of a barrel
- barrier-nurse — to tend (infectious patients) in isolation, to prevent the spread of infection
- barristership — the office of a barrister
- bartholinitis — Inflammation of Bartholin's cyst.
- basel accords — the three sets of rules, Basel I, Basel II, and Basel III, for regulating the banking industry, drawn up by the Basel Committee on Banking Supervision
- basement-rock — the undifferentiated assemblage of rock (basement rock) underlying the oldest stratified rocks in any region: usually crystalline, metamorphosed, and mostly, but not necessarily, Precambrian in age.
- basic fortran — (language) A subset of Fortran.
- basic process — Military. basic training. a soldier or airman receiving basic training.
- basidiospores — Plural form of basidiospore.
- basket dinner — a group social gathering, as of church members, to which participants contribute casseroles or other dishes to share.
- basket flower — a composite plant, Centaurea americana, of central U.S. to Mexico, having raylike heads of tubular rose-colored flowers, each surrounded by a whorl of bracts making the flower head appear as if it is set in a basket.
- basking shark — a very large plankton-eating shark, Cetorhinus maximus, often floating at the sea surface: family Cetorhinidae
- bass clarinet — a clarinet with the lowest range, in the octave below the B-flat clarinet
- bass response — the response of an audio reproduction system or component to low frequencies
- bass trombone — the lower-pitched of the two main types of trombone
- bass-baritone — a singer or voice in the bass range with baritone qualities
- basso rilievo — bas-relief
- basso-relievo — bas-relief
- bastard amber — a color of gelatin commonly used in stage lighting, similar to light amber but having a pinkish cast.