18-letter words containing b, o, y, t, r
- northeast by north — a point on the compass 11°15′ north of northeast. Abbreviation: NEbN.
- northwest by north — a point on the compass, 11°15′ north of northwest. Abbreviation: NWbN.
- octachlorobiphenyl — (organic compound) Either of twelve isomers of the polychlorinated biphenyl containing eight chlorine atoms.
- piperonyl butoxide — a light-brown liquid, C 1 9 H 3 0 O 5 , used chiefly as a synergist in certain insecticides.
- probability theory — the theory of analyzing and making statements concerning the probability of the occurrence of uncertain events. Compare probability (def 4).
- productivity bonus — an extra payment made to workers for being more productive or yielding more favourable results than normal
- provably difficult — The set or property of problems for which it can be proven that no polynomial-time algorithm exists, only exponential-time algorithms.
- range of stability — the angle to the perpendicular through which a vessel may be heeled without losing the ability to right itself.
- september holidays — a period of time in September when people do not have to go to school, college or work
- solubility product — the maximum number of undissociated ions, of an electrolyte in a saturated solution, capable at a given temperature of remaining in equilibrium with the undissolved phase of the solution.
- stand-by generator — an electrical system which operates automatically in case the usual system malfunctions
- stationary bicycle — an exercise bike
- three-body problem — the problem of calculating the motions of three bodies in space moving under the influence of only their mutual gravitational attraction.
- to put years on sb — if you say that something such as an experience or a way of dressing has put years on someone, you mean that it has made them look or feel much older
- too clever by half — If someone is too clever by half, they are very clever and they show their cleverness in a way that annoys other people.
- treaty obligations — obligations or duties that must be carried out by a party as according to a treaty they have entered into
- two-chamber system — the system of having two parliamentary chambers, as the House of Lords and the House of Commons in the United Kingdom
- urban contemporary — popular dance music incorporating elements of rap, rhythm-and-blues, funk, and soul.
- voluntary abortion — abortion (def 1).
- voluntary-abortion — Also called voluntary abortion. the removal of an embryo or fetus from the uterus in order to end a pregnancy.
- yerkes observatory — an astronomical observatory located in Williams Bay, Wisconsin, affiliated with the University of Chicago, and having a 40-inch (102-cm) refracting telescope, the largest refractor in the world.