15-letter words containing t, h, i, r

nonpsychiatrist — a person who is not a psychiatrist
north arlington — a city in NE New Jersey.
north australia — a former division of Australia; now part of the Northern Territory.
north caucasian — a language family including all the Caucasian languages north of the Caucasian divide, as Kabardian and the Circassian language proper, and a few between the divide and the Black Sea, as Abkhazian.
north highlands — a town in central California, near Sacramento.
north kingstown — a town in S central Rhode Island.
north yorkshire — a county in NE England. 3208 sq. mi. (8309 sq. km).
northern lights — aurora borealis.
northern oriole — an oriole, Icterus galbula, of North America, with highly distinctive eastern and western subspecies that interbreed in the Great Plains region.
northern paiute — a member of an American Indian people of Nevada, Oregon, and California, allied to the Paiute.
norwich terrier — one of an English breed of small, short-legged terriers having a straight, wiry, red, gray, or black-and-tan coat, and erect ears that distinguish it from the Norfolk terrier.
not for nothing — If you say that it was not for nothing that something happened, you are emphasizing that there was a very good reason for it to happen.
not in the race — given or having no chance
not turn a hair — any of the numerous fine, usually cylindrical, keratinous filaments growing from the skin of humans and animals; a pilus.
nothingarianism — Beliefs and practices of a nothingarian.
nottinghamshire — a county in central England. 854 sq. mi. (2210 sq. km).
nuke the fridge — (of a film, etc.) to lose credibility following a particularly ill-judged scene or plot development
nutcracker chin — a strong-looking chin
nyquist theorem — (communications) A theorem stating that when an analogue waveform is digitised, only the frequencies in the waveform below half the sampling frequency will be recorded. In order to reconstruct (interpolate) a signal from a sequence of samples, sufficient samples must be recorded to capture the peaks and troughs of the original waveform. If a waveform is sampled at less than twice its frequency the reconstructed waveform will effectively contribute only noise. This phenomenon is called "aliasing" (the high frequencies are "under an alias"). This is why the best digital audio is sampled at 44,000 Hz - twice the average upper limit of human hearing. The Nyquist Theorem is not specific to digitised signals (represented by discrete amplitude levels) but applies to any sampled signal (represented by discrete time values), not just sound.
ochlocratically — In an ochlocratic way.
old father time — time personified
omnium gatherum — a miscellaneous collection.
omnium-gatherum — a miscellaneous collection.
on a shoestring — If you do something or make something on a shoestring, you do it using very little money.
on short notice — with little warning
on the increase — growing, increasing
on the trail of — If you are on the trail of a person or thing, you are trying hard to find them or find out about them.
onychocryptosis — a form of nail disease in which nails are ingrown
orchestrational — Of or pertaining to orchestration.
ornithodelphian — of or relating to mammals of the class Ornithodelphia
ornithorhynchus — the platypus.
ortho-toluidine — Chemistry. a light-yellow, very slightly water-soluble liquid, C 7 H 9 N, the ortho isomer of toluidine: used in the manufacture of dyes, saccharin, and other organic compounds, and in textile printing processes.
orthoboric acid — boric acid (def 1). Compare ortho- (def 2).
orthodontically — from an orthodontic point of view
orthopaedic bed — a specially firm bed designed to help correct or ameliorate the discomfort of disorders of the spine and joints
orthopaedically — in an orthopaedic manner
orthophosphoric — (chemistry) Describing the ordinary form of phosphoric acid and its derivatives.
orthopsychiatry — an approach to psychiatry concerned with the study and treatment of behavioral disorders, especially of young people.
osteochondritis — inflammation of bone and cartilage.
osteochondrosis — a disease of bone and cartilage growth centers in children that begins as a necrosis and is followed by regeneration or renewed calcification.
otaheite orange — a small citrus bush, Citrus limonia otaitensis, having fragrant flowers and small orange fruit, often cultivated as a houseplant.
out of thin air — suddenly and unexpectedly
outdoorsmanship — a person devoted to outdoor sports and recreational activities, as hiking, hunting, fishing, or camping.
over-enthusiasm — absorbing or controlling possession of the mind by any interest or pursuit; lively interest: He shows marked enthusiasm for his studies.
overachievement — to perform, especially academically, above the potential indicated by tests of one's mental ability or aptitude.
oyster toadfish — See under toadfish (def 1).
palaeoanthropic — relating to palaeoanthropology
panoramic sight — an artillery sight that can be rotated horizontally in a full circle.
paraffin heater — a heater which is fuelled by paraffin
paraheliotropic — (of leaves) turning away from light; sun-avoiding

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