18-letter words containing y, a, r, b, o
- lowell observatory — the astronomical observatory, situated in Flagstaff, Arizona, at which Pluto was discovered in 1930.
- madeira embroidery — broderie anglaise.
- metabolic syndrome — Pathology. a group of medical conditions present simultaneously in a patient, as high blood pressure, low HDL cholesterol levels, and an excess of abdominal fat, that increases a person's risk of heart disease, stroke, and diabetes. Also called insulin resistance syndrome.
- mountain cranberry — cowberry
- nebular hypothesis — the theory that the solar system evolved from a mass of nebular matter: prominent in the 19th century following its precise formulation by Laplace.
- nobiliary particle — a preposition forming part of a title of nobility or surname, as French de or German von.
- nonachlorobiphenyl — (organic compound) Either of three isomers of the polychlorinated biphenyl containing nine chlorine atoms.
- northeast by north — a point on the compass 11°15′ north of northeast. Abbreviation: NEbN.
- octachlorobiphenyl — (organic compound) Either of twelve isomers of the polychlorinated biphenyl containing eight chlorine atoms.
- passive vocabulary — all the words, collectively, that a person can understand
- personal bodyguard — a person employed to protect a particular person
- probability theory — the theory of analyzing and making statements concerning the probability of the occurrence of uncertain events. Compare probability (def 4).
- provably difficult — The set or property of problems for which it can be proven that no polynomial-time algorithm exists, only exponential-time algorithms.
- pulmonary embolism — the blockage of a pulmonary artery, often by a blood clot, that stops the flow of blood to the lungs and which can result in death if untreated
- range of stability — the angle to the perpendicular through which a vessel may be heeled without losing the ability to right itself.
- reversionary bonus — a bonus added to the sum payable on death or at the maturity of a with-profits assurance policy
- rheims-douay bible — Douay Bible.
- ride a hobby horse — an activity or interest pursued for pleasure or relaxation and not as a main occupation: Her hobbies include stamp-collecting and woodcarving.
- rosebay willowherb — a perennial onagraceous plant, Chamerion (formerly Epilobium) angustifolium, that has spikes of deep pink flowers and is widespread in open places throughout N temperate regions
- september holidays — a period of time in September when people do not have to go to school, college or work
- stand-by generator — an electrical system which operates automatically in case the usual system malfunctions
- stationary bicycle — an exercise bike
- subsidiary company — a company whose controlling interest is owned by another company.
- 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.