13-letter words containing n, o, b, t
- 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.
- odontoblastic — Relating to odontoblasts.
- on the bounce — in succession; one after the other
- on the bubble — in a situation in which the outcome is uncertain but already in the process of being determined or decided
- on the button — a small disk, knob, or the like for sewing or otherwise attaching to an article, as of clothing, serving as a fastening when passed through a buttonhole or loop.
- on the double — twice as large, heavy, strong, etc.; twofold in size, amount, number, extent, etc.: a double portion; a new house double the size of the old one.
- only-begotten — (of a child) being the only offspring of its father
- open a bottle — If you open a bottle, you remove the cork or cap.
- open brethren — one of the two main divisions of the Plymouth Brethren that, in contrast to the Exclusive Brethren, permits contacts with members outside the sect
- open-timbered — constructed so that the timbers are exposed.
- 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.
- optical bench — an apparatus, as a special table or rigid beam, for the precise positioning of light sources, screens, and optical instruments used for optical and photometric studies, having a ruled bar to which these devices can be attached and along which they can be readily adjusted.
- 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.
- ornithophobia — Fear of birds.
- ostensibility — The quality of being ostensible.
- out and about — busy, active outside the home
- out of bounds — Sports. being beyond or passing the limits or boundaries of a field, course, etc., marking the area within which the ball, puck, or the like is legally in play.
- out on a limb — a part or member of an animal body distinct from the head and trunk, as a leg, arm, or wing: the lower limbs; artificial limbs.
- out-of-bounds — Sports. being beyond or passing the limits or boundaries of a field, course, etc., marking the area within which the ball, puck, or the like is legally in play.
- 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.
- 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.
- 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 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.
- penobscot bay — an inlet of the Atlantic in S Maine. 30 miles (48 km) long.
- 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
- personal best — A sports player's personal best is the highest score or fastest time that they have ever achieved.
- 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.
- pilot balloon — a balloon for the visual observation of upper-atmosphere wind currents.
- plebification — the act of making popular or vulgar
- plumbosolvent — able to dissolve lead
- pollen basket — (of bees) a smooth area on the hind tibia of each leg fringed with long hairs and serving to transport pollen.
- polling booth — a booth in which voters cast their votes.
- polybutadiene — a rubberlike polymer of butadiene blended with other synthetics to replace natural rubber in tires.
- polycarbonate — a synthetic thermoplastic resin, a linear polymer of carbonic acid, used for molded products, films, and nonbreakable windows.
- polythene bag — a bag made of polythene, esp one used to store or protect food or household articles
- port colborne — a city in SE Ontario, in S Canada.
- 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.
- postdebutante — following the stage of being a debutante
- postembryonic — occurring after the embryonic phase.
- postpubescent — a young person in his or her early teens.