13-letter words containing r, e, s, a
- ballistospore — a spore, esp a fungal spore, that is forcefully ejected from its source
- balmer series — a series of lines in the hydrogen spectrum, discovered by Johann Jakob Balmer (1825–98) in 1885
- 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
- 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
- barbados aloe — a tropical aloe, Aloe barbadensis (or A. vera), of the lily family, having clusters of yellow flowers: its juice is used medicinally.
- barbarousness — The state or quality of being barbarous.
- 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.
- 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
- 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 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.
- 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.
- bastard eigne — the first-born illegitimate son of parents whose second son was legitimate.
- bastard title — half title (def 1).
- bastard-title — Also called bastard title. the first printed page of certain books, appearing after the end papers and before the title page and containing only the title of the book.
- batch-process — to perform batch processing on (files)
- battlecruiser — A large warship of a type built in the early 20th century, carrying similar armament to a battleship but faster and more lightly armored.
- battlegrounds — Plural form of battleground.
- beam splitter — a system that divides a beam of light, electrons, etc, into two or more paths
- bear's-breech — a widely cultivated S European acanthus plant, Acanthus mollis, having whitish purple-veined flowers