13-letter words containing a, n, b, r
- novo hamburgo — a city in Rio Grande do Sul state, S Brazil.
- nubian desert — an arid region in the NE Sudan.
- obi-wan error — (programming) /oh'bee-won" er"*r/ (RPI, from "off-by-one" and the Obi-Wan Kenobi character in "Star Wars") A kind of off-by-one error.
- observational — of, relating to, or founded on observation, especially founded on observation rather than experiment.
- obstetricians — Plural form of obstetrician.
- octane number — (of gasoline) a designation of antiknock quality, numerically equal to the percentage of isooctane by volume in a mixture of isooctane and normal heptane that matches the given gasoline in antiknock characteristics.
- old bulgarian — the Bulgarian language of the Middle Ages.
- onus probandi — the burden of proof.
- opisthobranch — any gastropod mollusk of the order Opisthobranchia, as the sea slugs, sea butterflies, and sea hares, characterized by a vestigial or absent mantle and shell and two pairs of tentacles.
- ora pro nobis — a Latin invocation meaning pray for us
- orbital index — the ratio of the maximum breadth to the maximum height of the orbital cavity multiplied by 100.
- orbitofrontal — Located in the frontal lobes above the orbits of the eyes.
- organ-builder — a maker of organs
- ornithophobia — Fear of birds.
- osborne, adam — Adam Osborne
- outward bound — (in Britain) a scheme to provide adventure training for young people
- outward-bound — headed in an outward direction, as toward foreign ports: We passed an outward-bound ship as we came into the harbor.
- over-abundant — an excessive amount or abundance; surfeit: an overabundance of sugar in the diet.
- overabundance — an excessive amount or abundance; surfeit: an overabundance of sugar in the diet.
- overbalancing — Present participle of overbalance.
- overbearingly — domineering; dictatorial; haughtily or rudely arrogant.
- overbreathing — hyperventilation
- overexuberant — effusively and almost uninhibitedly enthusiastic; lavishly abundant: an exuberant welcome for the hero.
- overnight bag — a travel bag large enough to hold personal articles and clothing for an overnight trip.
- overrun brake — a brake fitted to a trailer or other towed vehicle that prevents the towed vehicle travelling faster than the towing vehicle when slowing down or descending an incline
- paleosiberian — a group of languages comprising those languages of Siberia that are not affiliated with Indo-European, Altaic, Uralic, or Eskimo-Aleut and including the Chukotian family and the unrelated language isolates Ket, Nivkh, and Yukaghir; Paleo-Asiatic.
- pandora's box — a source of extensive but unforeseen troubles or problems: The senate investigation turned out to be a Pandora's box for the administration.
- parietal bone — either of a pair of membrane bones forming, by their union at the sagittal suture, part of the sides and top of the skull.
- parking brake — emergency brake.
- parking orbit — a temporary orbit in which a spacecraft awaits the next phase of its mission.
- parsons table — a square or rectangular table, often of lightweight material, with straight legs that are square in cross section and of the same thickness as the top extending from the corners flush with the top so as to appear jointless.
- partitionable — a division into or distribution in portions or shares.
- path-breaking — very original; ground-breaking
- peanut butter — a paste made from ground roasted peanuts, used as a spread or in cookery.
- pebble garden — a small ornamental garden mainly composed of an arrangement of pebbles
- pentobarbital — a barbiturate, C 1 1 H 1 7 N 2 O 3 , used as a hypnotic and as a sedative.
- perambulation — to walk through, about, or over; travel through; traverse.
- perditionable — deserving perdition or damnation
- perennibranch — any amphibian that retains its gills throughout its life
- personal best — A sports player's personal best is the highest score or fastest time that they have ever achieved.
- peruvian bark — cinchona (def 2).
- phenobarbital — a white, crystalline powder, C 1 2 H 1 2 N 2 O 3 , used as a sedative, a hypnotic, and as an antispasmodic in epilepsy.
- pigeon breast — chicken breast.
- pine grosbeak — a large grosbeak, Pinicola enucleator, of coniferous forests of northern North America and Eurasia, the male of which has rose and gray plumage.
- plain bearing — any of various bearings, not containing rolling elements, that present to the shaft or axle they support broad areas of corresponding form, usually segments of a cylinder.
- plant breeder — a botanist concerned with the origin and evolution of plants
- polycarbonate — a synthetic thermoplastic resin, a linear polymer of carbonic acid, used for molded products, films, and nonbreakable windows.
- post-cambrian — Geology. noting or pertaining to a period of the Paleozoic Era, occurring from 570 million to 500 million years ago, when algae and marine invertebrates were the predominant form of life.
- pouring-basin — (in a vacuum induction furnace) a trough through which molten metal flows under vacuum to a mold chamber.
- pre-columbian — of or relating to the Americas before the arrival of Columbus: pre-Columbian art; pre-Columbian Indians.