13-letter words containing b, r, o, t
- beta carotene — a yellowish form of carotene: a dietary deficiency of this is associated with a greater risk of certain cancers
- beta receptor — a receptor, found on the surface of some cells of the sympathetic nervous system, that is stimulated by certain adrenergic substances: such stimulation results in certain physiological responses, such as acceleration of the action of the heart and dilatation of the arteries supplying heart and skeletal muscles
- beta-carotene — the most abundant of various isomers of carotene, C 40 H 56 , that can be converted by the body to vitamin A.
- beta-receptor — a site on a cell, as of the heart, that, upon interaction with epinephrine or norepinephrine, controls heartbeat and heart contractability, vasodilation, smooth muscle inhibition, and other physiological processes.
- bibliolatrous — characterized by bibliolatry
- bibliothecary — a librarian
- bibliotherapy — the use of reading as therapy
- bidirectional — (of a printhead) capable of printing from left to right and from right to left
- big brown bat — any of several small to medium-sized common bats of the genera Myotis and Eptesicus, found worldwide in caves, trees, and buildings, including M. lucifugus (little brown bat) and E. fuscus (big brown bat) a widespread North American species.
- bill of entry — a list of goods received at a customs house for export or import
- bio-autograph — an analytical technique in which organic compounds are separated by chromatography and identified by studying their effects on microorganisms.
- bio-terrorism — the use of living organisms and their toxic products to kill or incapacitate, esp as a political weapon
- bioautography — an analytical technique in which organic compounds are separated by chromatography and identified by studying their effects on microorganisms.
- bioelectrical — relating to electrical current generated by biological activity
- bioenergetics — the study of energy transformations in living organisms and systems
- biotic factor — a living thing, as an animal or plant, that influences or affects an ecosystem: How do humans affect other biotic factors? Weather is not a biotic factor because it is not alive.
- bird dismount — Hecht1 (def 1).
- birth control — Birth control means planning whether to have children, and using contraception to prevent having them when they are not wanted.
- birthing pool — a large bath in which a woman can give birth
- birthing room — a section of a hospital or an outpatient facility set aside and equipped for childbirth and usually simulating a home environment in which family members or friends may be present during the delivery.
- bite your lip — If you bite your lip, you try very hard not to show the anger or distress that you are feeling.
- bitter almond — a variety of almond whose bitter seeds yield hydrocyanic acid upon hydrolysis
- bitter orange — a globose, reddish-yellow, bitter or sweet, edible citrus fruit.
- black country — a district in the English Midlands, around Birmingham: so called from the soot and grime produced by the many local industries.
- blamestorming — a discussion or meeting for the purpose of assigning blame.
- blanketflower — a hardy flowering plant, Gaillardia aristata, that grows in the US
- blarney stone — a stone in Blarney Castle, in the SW Republic of Ireland, said to endow whoever kisses it with the gift of the gab and skill in flattery
- blepharoplast — a cylindrical cytoplasmic body in protozoa
- block letters — Block letters are the same as block capitals.
- blood blister — a blister filled with blood
- blood brother — A man's blood brother is a man he has sworn to treat as a brother, often in a ceremony which involves mixing a small amount of their blood.
- blood product — a pharmaceutical product made from blood, such as Factor VIII
- board meeting — a meeting of the board of a company or other organization
- body snatcher — (formerly) a person who robbed graves and sold the corpses for dissection
- body-centered — (of a crystal structure) having lattice points at the centers of the unit cells.
- 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.
- bolt up right — a movable bar or rod that when slid into a socket fastens a door, gate, etc.
- bomber jacket — A bomber jacket is a short jacket which is gathered into a band at the waist or hips.
- bonfire night — Bonfire Night is the popular name for Guy Fawkes Night.
- booby-trapped — (of a building, vehicle, etc) planted with a booby trap
- boom operator — a person who operates a boom
- booster cable — either of a pair of electric cables having clamps at each end and used for starting the engine of a vehicle whose battery is dead.
- bootlace worm — a nemertean worm, Lineus longissimus, that inhabits shingly shores and attains lengths of over 6 m (20 ft)
- border patrol — a government agency in charge of preventing terrorists, weapons, and illegal immigrants entering the country
- border states — slave states bordering on the free states before the Civil War: Mo., Ky., Va., Md., & Del.
- borlotti bean — variety of kidney bean
- boron nitride — a white inert crystalline solid existing both in a graphite-like form and in an extremely hard diamond-like form (borazon). It is used as a refractory, high-temperature lubricant and insulator, and heat shield. Formula: BN
- borrowed time — an uncertain, usually limited period of time extending beyond or postponing the occurrence of something inevitable.
- boston matrix — a two-dimensional matrix, used in planning the business strategy of a large organization, that identifies those business units in the organization that generate cash and those that use it
- boston rocker — a type of 19th-cent. American rocking chair, having a curved wooden seat and a high back formed of spindles held in place by a broad headpiece