17-letter words containing t, a, i, n, s
- nuclear chemistry — the branch of chemistry concerned with nuclear reactions
- nuclear scientist — a scientist who studies nuclear physics
- nursery education — education provided at a school for young children, usually from three to five years old
- objectionableness — The quality of being objectionable.
- observation tower — lookout, observation point
- odds-on favourite — a person, team, horse, etc that is regarded as the most likely to win a competition
- odour of sanctity — sanctimoniousness
- of its own accord — If something happens of its own accord, it seems to happen by itself, without anyone making it happen.
- old south arabian — a group of four closely related Semitic languages, having a writing system and used from about the eighth to the fifth centuries b.c. in the southern part of Arabia.
- old spanish trail — an overland route from Santa Fe, N. Mex., to Los Angeles, Calif., first marked out in 1776 by Spanish explorers and missionaries.
- olympic mountains — a mountain range in NW Washington: part of the Coast Range. Highest peak: Mount Olympus, 2427 m (7965 ft)
- omphalomesenteric — (anatomy) Of or pertaining to the umbilicus and mesentery.
- on someone's tail — following or shadowing someone closely
- on speaking terms — the act, utterance, or discourse of a person who speaks.
- on the heavy side — tending to be too heavy
- on the pig's back — successful; established
- on-street parking — parking (of a car, vehicle, etc) that is or is allowed to be done on a street
- one size fits all — (of clothing) designed to fit people of a wide range of sizes.
- one-size-fits-all — (of clothing) designed to fit people of a wide range of sizes.
- one-time password — (security) (OTP) A security system that requires a new password every time a user authenticates themselves, thus protecting against an intruder replaying an intercepted password. OTP generates passwords using either the MD4 or MD5 hashing algorithms. The equivalent term "S/Key", developed by Bellcore, is a trademark of Telcordia Technologies, so the name OTP is used increasingly. See RFC 1760 - "The S/KEY One-Time Password System" and RFC 1938 - "A One-Time Password System".
- opening arguments — the statements or arguments provided by lawyers at the beginning of a trial
- operation sealion — the codename for Hitler's proposed invasion (1940) of Great Britain
- operations centre — a centre where activities of a business, organization, etc, are administrated and take place
- opisthobranchiate — (zoology) Of or pertaining to the Opisthobranchiata.
- opportunistically — adhering to a policy of opportunism; practicing opportunism.
- optical astronomy — the branch of observational astronomy using telescopes to observe or photograph celestial objects in visible light.
- organ-pipe cactus — a treelike or columnar cactus, Lemaireocereus marginatus, of Mexico, having a central, erect spine surrounded by spreading spines in clusters of five to eight, and funnel-shaped, brownish-purple flowers.
- organic chemistry — the branch of chemistry, originally limited to substances found only in living organisms, dealing with the compounds of carbon.
- osculating circle — circle of curvature.
- otolaryngologists — Plural form of otolaryngologist.
- otto von bismarck — Otto von [ot-oh von;; German aw-toh fuh n] /ˈɒt oʊ vɒn;; German ˈɔ toʊ fən/ (Show IPA), 1815–98, German statesman: first chancellor of modern German Empire 1871–90.
- over-compensation — a pronounced striving to neutralize and conceal a strong but unacceptable character trait by substituting for it an opposite trait.
- over-conservative — disposed to preserve existing conditions, institutions, etc., or to restore traditional ones, and to limit change.
- pacific northwest — the region of North America lying north of the Columbia River and west of the Rockies
- paleoconservative — a person advocating an older, traditional type of conservatism, especially in politics.
- papanicolaou test — Pap test.
- paralysis agitans — Parkinson's disease
- paratungstic acid — an oxyacid acid of tungsten. Formula: H10W12O14
- particle kinetics — Particle kinetics is the study of the movement of particles and the forces that cause this movement.
- parts per million — the number of units (of a substance) present in a million units of another substance
- pascal's triangle — a triangular arrangement of the binomial coefficients of the expansion (x + y) n for positive integral values of n.
- pashmina politics — the adoption of political policies immediately after they have gone out of fashion
- passenger station — a station used by passengers
- passenger traffic — number of passengers
- passive restraint — a safety device, as an air bag or special seat belt, that is activated automatically to protect an automobile passenger at the moment of impact when a collision occurs.
- pasteur institute — an organization in Paris that was founded in 1887. It does research on micro-organisms and diseases
- paternalistically — the system, principle, or practice of managing or governing individuals, businesses, nations, etc., in the manner of a father dealing benevolently and often intrusively with his children: The employees objected to the paternalism of the old president.
- penitential psalm — any of the Psalms (the 6th, 32nd, 38th, 51st, 102nd, 130th, and 143rd) that give expression to feelings of penitence and that are used in various Christian liturgical services.
- perpetual spinach — a variety of spinach that keeps producing edible leaves
- personal distance — personal space.