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

not in the race — given or having no chance
nottinghamshire — a county in central England. 854 sq. mi. (2210 sq. km).
nucleophilicity — (uncountable) The condition of being nucleophilic.
nucleosynthesis — the formation of new atomic nuclei by nuclear reactions, thought to occur in the interiors of stars and in the early stages of development of the universe.
nucleosynthetic — Of or pertaining to nucleosynthesis.
nuke the fridge — (of a film, etc.) to lose credibility following a particularly ill-judged scene or plot development
null hypothesis — (in the statistical testing of a hypothesis) the hypothesis to be tested.
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.
oil of the sick — holy oil used in the sacrament of extreme unction.
old father time — time personified
old-established — established for a long time
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 heat/in heat — When a female animal is on heat in British English, or in heat in American English, she is in a state where she is ready to mate with a male animal, as this will probably result in her becoming pregnant.
on short notice — with little warning
on the increase — growing, increasing
on the point of — a sharp or tapering end, as of a dagger.
on the qui vive — on the qui vive, on the alert; watchful: Special guards were on the qui vive for trespassers.
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.
one-night stand — a single performance in one locale, as by a touring theatrical company, before moving on to the next engagement.
ophthalmoplegia — Paralysis of the muscles within or surrounding the eye.
orchestrational — Of or pertaining to orchestration.
ornithodelphian — of or relating to mammals of the class Ornithodelphia
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.
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
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 in the cold — having a relatively low temperature; having little or no warmth: cold water; a cold day.
out in the open — knowledge: public
outside the box — a container, case, or receptacle, usually rectangular, of wood, metal, cardboard, etc., and often with a lid or removable cover.
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).
pachymeningitis — inflammation of the dura mater of the brain and spinal cord
packet-switched — packet switching
pain in the net — flamer
palaeoanthropic — relating to palaeoanthropology
paleolithic man — any of the prehistoric populations of humans, as the Cro-Magnon, living in the late Pliocene and the Pleistocene epochs.
paraffin heater — a heater which is fuelled by paraffin
paraheliotropic — (of leaves) turning away from light; sun-avoiding
parasympathetic — pertaining to that part of the autonomic nervous system consisting of nerves and ganglia that arise from the cranial and sacral regions and function in opposition to the sympathetic system, as in inhibiting heartbeat or contracting the pupil of the eye.
parenthetically — of, pertaining to, noting, or of the nature of a parenthesis: several unnecessary parenthetic remarks.
parish register — the register of the christenings, marriages, and burials in a parish.
parthenogenesis — development of an egg without fertilization.
parthenogenetic — development of an egg without fertilization.
patagonian hare — a burrowing, gray, long-eared and long-legged cavy of the genus Dolichotis, native to South America.

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