13-letter words containing a, r, m
- balmer series — a series of lines in the hydrogen spectrum, discovered by Johann Jakob Balmer (1825–98) in 1885
- 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.
- 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
- bank examiner — a public official appointed under U.S. state or federal laws to inspect and audit the operations and accounts of banks in the examiner's jurisdiction.
- bankrupt worm — a roundworm (genus Trichostrongylus) that is an intestinal parasite of birds and mammals, especially devastating to young livestock.
- barium yellow — a yellow, crystalline compound, BaCrO 4 , used as a pigment (barium yellow)
- barrier cream — a cream used to protect the skin, esp the hands, from dirt and from the action of oils or solvents
- bartholomew i — (Dimitrios Archontonis) born 1940, Archbishop of Constantinople and Ecumenical Patriarch of the Eastern Orthodox Church since 1991.
- baryon number — the number of baryons in a system minus the number of antibaryons
- 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.
- bass trombone — the lower-pitched of the two main types of trombone
- bastard amber — a color of gelatin commonly used in stage lighting, similar to light amber but having a pinkish cast.
- battering ram — A battering ram is a long heavy piece of wood that is used to knock down the locked doors of buildings.
- battering-ram — an ancient military device with a heavy horizontal ram for battering down walls, gates, etc.
- beam splitter — a system that divides a beam of light, electrons, etc, into two or more paths
- bear the palm — to be the winner; take the prize
- beat the drum — a musical percussion instrument consisting of a hollow, usually cylindrical, body covered at one or both ends with a tightly stretched membrane, or head, which is struck with the hand, a stick, or a pair of sticks, and typically produces a booming, tapping, or hollow sound.
- beau brummell — any dandy or fop
- bedroom farce — a light comedy about sexual relationships
- beleaguerment — a blockade or siege
- bergamot mint — an aromatic herb, Mentha piperita citrata, having a lemonlike odor when crushed.
- berkeleianism — the philosophical system of George Berkeley, holding that objects exist only when perceived, that God's perception sustains the universe, and that there is no independent substratum or substance in which these perceptions inhere
- bermuda grass — a widely distributed grass, Cynodon dactylon, with wiry creeping rootstocks and several purplish spikes of flowers arising from a single point: used for lawns, pasturage, binding sand dunes, etc
- bermuda onion — a large white or yellow onion with a mild flavor, grown in Texas, California, etc.
- beverage room — a room in a tavern, hotel, etc, in which alcoholic drinks are served
- bharat natyam — a form of Indian classical ballet
- biculturalism — the characteristics, or policy, of a two-cultured society
- bildungsroman — a novel concerned with a person's formative years and development
- bilinear form — a function or functional of two variables that is linear with respect to each variable when the other variable is held fixed.
- billiard room — a room in a house, club, etc., where billiards is played.
- bimolecularly — in a bimolecular fashion
- binary number — a number expressed in binary notation, as 1101.101 = 1 × 23 + 1 × 22 + 0 × 21 + 1 × 20 + 1 × 2–1 + 0 × 2–2 + 1 × 2–3 = 13 5⁄8
- binary system — a system involving only two elements, as 0 and 1 or yes and no.
- bipartisanism — the quality of being bipartisan
- bitter almond — a variety of almond whose bitter seeds yield hydrocyanic acid upon hydrolysis
- black margate — a grayish grunt, Anisotremus surinamensis, of the Atlantic Ocean from Florida to Brazil.
- black mustard — a Eurasian plant, Brassica (or Sinapsis) nigra, with clusters of yellow flowers and pungent seeds from which the condiment mustard is made: family Brassicaceae (crucifers)
- black skimmer — a black and white New World skimmer, Rynchops nigra, having a bill with a reddish-orange base.
- blame culture — the tendency to look for one person or organization that can be held responsible for a bad state of affairs, an accident, etc
- blamestorming — a discussion or meeting for the purpose of assigning blame.
- blepharospasm — spasm of the muscle of the eyelids, causing the eyes to shut tightly, either as a response to painful stimuli or occurring as a form of dystonia
- block diagram — a diagram showing the interconnections between the parts of an industrial process
- blow an eprom — /bloh *n ee'prom/ (Or "blast", "burn") To program a read-only memory, e.g. for use with an embedded system. This term arose because the programming process for the Programmable Read-Only Memory (PROM) that preceded present-day Erasable Programmable Read-Only Memory (EPROM) involved intentionally blowing tiny electrical fuses on the chip. The usage lives on (it's too vivid and expressive to discard) even though the write process on EPROMs is nondestructive.
- board measure — a system of units for measuring wood based on the board foot. 1980 board feet equal one standard
- board meeting — a meeting of the board of a company or other organization
- boardroom pay — the salaries and bonuses given to the directors of a company
- bohr magneton — a unit that is used to indicate the magnetic moment of the electron structure in an atom, equal to 9.27 × 10 −21 erg/gauss.