13-letter words containing a, c, t, i
- basidiomycete — any fungus of the phylum Basidiomycota (formerly class Basidiomycetes), in which the spores are produced in basidia. The group includes boletes, puffballs, smuts, and rusts
- bass clarinet — a clarinet with the lowest range, in the octave below the B-flat clarinet
- bathylimnetic — (of an organism) living in the depths of lakes and marshes
- batrachotoxin — a steroidal alkaloid, C31H42N2O6, found in the skin of certain Neotropical frogs (genus Phyllobates) and used on poison arrows: one of the most powerful natural neurotoxins known
- 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.
- beatification — a beatifying or being beatified
- behavioristic — the theory or doctrine that human or animal psychology can be accurately studied only through the examination and analysis of objectively observable and quantifiable behavioral events, in contrast with subjective mental states.
- benedictional — a book of benedictions or blessings
- beneficential — relating to beneficence
- beneficiation — the procedure of reducing ores
- benefit match — a sports match organized to raise money for charity, or for a particular player
- benthopelagic — relating to species living at the bottom of the sea
- best practice — Best practice is the way of running a business or providing a service that is recognized as correct or most effective.
- beta function — a function of two variables, usually expressed as an improper integral and equal to the quotient of the product of the values of the gamma function at each variable divided by the value of the gamma function at the sum of the variables.
- beta particle — a high-speed electron or positron emitted by a nucleus during radioactive decay or nuclear fission
- beta-blocking — acting to inhibit the activity of the nerves that are stimulated by adrenaline
- bibliothecary — a librarian
- bicentennials — pertaining to or in honor of a 200th anniversary: bicentennial celebration; a bicentennial exposition.
- biconditional — (of a proposition) asserting that the existence or occurrence of one thing or event depends on, and is dependent on, the existence or occurrence of another, as “A if and only if B.”.
- bicontinental — of, on, or involving two continents: a bicontinental survey.
- biculturalism — the characteristics, or policy, of a two-cultured society
- bidenticulate — having two small teeth or toothlike processes.
- bidirectional — (of a printhead) capable of printing from left to right and from right to left
- bimetallistic — relating to bimetallism
- bioaccumulate — (of substances, esp toxins) to build up within the tissues of organisms
- biocompatible — not rejected by the body
- bioelectrical — relating to electrical current generated by biological activity
- biostatistics — the use of statistics to analyse biological data
- biosystematic — relating to biosystematics
- 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-watching — Bird-watching is the activity of watching and studying wild birds in their natural surroundings.
- birectangular — having two right angles.
- birthday cake — a special cake eaten at a birthday party
- birthday card — a greeting card sent on someone's birthday
- biscuit bread — biscuits or a biscuit: I like biscuit bread more than corn bread for supper.
- bisectionally — from a bisectional point of view
- black section — (in Britain in the 1980s) an unofficial group within the Labour Party in any constituency that represented the interests of local Black people
- black studies — a program of studies in black history and culture offered by a school or college, often including Afro-American history and black literature.
- blacksmithing — the work of a blacksmith.
- blastomycosis — a fungal infection particularly affecting the lungs
- block capital — a sans-serif letter with lines of uniform weight.
- boat neckline — a wide, high neckline that follows the curve of the collarbone and ends in points on the shoulder seams.
- bombastically — (of speech, writing, etc.) high-sounding; high-flown; inflated; pretentious.
- bona vacantia — unclaimed goods
- bowling match — a game of bowls
- brace and bit — a hand tool for boring holes, consisting of a cranked handle into which a drilling bit is inserted
- break the ice — to relieve shyness or reserve, esp between strangers
- brilliant cut — a cut for gems
- brilliant-cut — a cut intended to enhance the brilliance of a gem with the least possible sacrifice of weight, characterized by a form resembling two pyramids set base to base, truncated so as to give a broad table and a very small culet, and having from 18 to 104 facets, 58 being typical.
- bureaucratism — an official of a bureaucracy.