20-letter words containing t, a, b, o, r

fast-breeder reactor — a breeder reactor in which there is no moderator and fission is caused by high-energy neutrons.
feast of tabernacles — Sukkoth.
fold-and-thrust belt — a linear or arcuate region of the earth's surface that has been subjected to severe folding and thrust faulting
for sb's delectation — If you do something for someone's delectation, you do it to give them enjoyment or pleasure.
forbidden transition — an electronic transition in an atom, molecule, etc, that is not permitted by electric dipole selection rules
front-to-back engine — an engine in which the crankshaft is arranged front to back along the axis of the vehicle
give a wide berth to — to keep clear of; avoid
go from bad to worse — worsen
gorno-altai republic — a constituent republic of S Russia: mountainous, rising over 4350 m (14 500 ft) in the Altai Mountains of the south. Capital: Gorno-Altaisk. Pop: 202 900 (2002). Area: 92 600 sq km (35 740 sq miles)
greatest lower bound — a lower bound that is greater than or equal to all the lower bounds of a given set: 1 is the greatest lower bound of the set consisting of 1, 2, 3. Abbreviation: glb.
hyperbolic cotangent — a hyperbolic function that is the ratio of cosh to sinh, being the reciprocal of tanh; coth
indian cucumber root — a North American plant, Medeola virginiana, of the lily family, having whorled leaves, nodding, greenish-yellow flowers, and an edible root.
information builders — Distributors of LEVEL5 OBJECT. Telephone +1 800 969 INFO.
integration by parts — Mathematics. a method of evaluating an integral by use of the formula, ∫udv = uv − ∫vdu.
isosorbide dinitrate — a coronary vasodilator, C 6 H 8 N 2 O 8 , used in the prophylaxis and treatment of angina.
job control language — a language used to construct statements that identify a particular job to be run and specify the job's requirements to the operating system under which it will run. Abbreviation: JCL.
laboratory assistant — laboratory technician, lab assistant
laboratory diagnosis — scientific analysis of a disease
laboratory equipment — apparatus for scientific research and experiments
like a ton of bricks — (used esp of the manner of punishing or reprimanding someone) with great force; severely
love's labour's lost — a comedy (1594–95?) by Shakespeare.
marginal probability — (in a multivariate distribution) the probability of one variable taking a specific value irrespective of the values of the others
megabytes per second — (unit) (MBps, MB/s) Millions of bytes per second. A unit of data rate. 1 MB/s = 1,000,000 bytes per second (not 1,048,576).
member of parliament — A Member of Parliament is a person who has been elected by the people in a particular area to represent them in a country's parliament. The abbreviation MP is often used.
membranous labyrinth — an intricate combination of paths or passages in which it is difficult to find one's way or to reach the exit. Synonyms: maze, network, web.
meta-dichlorobenzene — a colorless liquid, C 6 H 4 Cl 2 , soluble in alcohol and ether: used as a fumigant and insecticide.
miliary tuberculosis — tuberculosis in which the bacilli are spread by the blood from one point of infection, producing small tubercles in other parts of the body.
moreton bay chestnut — an Australian leguminous tree, Castanospermum australe, having thin smooth bark and yellow or reddish flowers: used in furniture manufacture
neon lamp (or tube) — a discharge lamp containing neon, that ionizes and glows with a red light (neon light) when an electric current is sent through it: used esp. in advertising signs
nickel tetracarbonyl — nickel carbonyl.
northern leaf blight — a disease of corn caused by the fungus Exsherohilum turcicum, characterized by elongate tan-gray elliptical spots with subsequent blighting and necrosis of leaves.
objective relativism — the doctrine that knowledge of real objects is relative to the individual.
off the beaten track — formed or shaped by blows; hammered: a dish of beaten brass.
off-the-job training — training which is carried out away from your normal place of work
on o's best behavior — If someone is on their best behavior, they are trying very hard to behave well.
on the drawing board — in the planning stage
on the starboard bow — within 45 degrees to the starboard of straight ahead
operation barbarossa — the codename for Hitler's invasion (1941) of Russia
operational database — (database) A database containing up-to-date, modifiable data, in contrast to a decision support database.
particle beam weapon — a weapon that fires particle beams into the atmosphere or space
peasecod breastplate — a breastplate having a long central ridge terminating in a raised area overhanging the waistline.
pentobarbital sodium — a barbiturate drug used in medicine as a sedative and hypnotic. Formula: C11H17N2O3Na
periodontal membrane — the collagenous, fibrous connective tissue between the cementum of the tooth and the alveolus.
physical double star — two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star) or those that are relatively close together and comprise a single physical system (physical double star)
potassium bichromate — an orange-red, crystalline, water-soluble, poisonous powder, K 2 Cr 2 O 7 , used chiefly in dyeing, photography, and as a laboratory reagent.
potassium bitartrate — cream of tartar.
potassium-bitartrate — a white, crystalline, water-soluble powder, C 4 H 5 KO 6 , used chiefly as an ingredient in baking powders and in galvanic tinning of metals. Also called potassium bitartrate, potassium acid tartrate. Compare tartar (def 3).
proactive inhibition — the tendency for earlier memories to interfere with the retrieval of material learned later
probability function — the function the values of which are probabilities of the distinct outcomes of a discrete random variable
prohibited substance — a substance, such as a drug, etc, that is banned or forbidden by law or other authority

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