13-letter words containing h, a, t, i
- non-chromatic — pertaining to color or colors.
- non-rheumatic — pertaining to or of the nature of rheumatism.
- non-technical — belonging or pertaining to an art, science, or the like: technical skill.
- nonalphabetic — not employing alphabetic order
- nonauthorized — Not authorized.
- nonchauvinist — a person who is not a chauvinist
- nonexhaustive — exhausting a subject, topic, etc.; comprehensive; thorough: He published an exhaustive study of Greek vases.
- nonhaemolytic — relating to a transfusion reaction in which the red blood cells survive
- nonhereditary — passing, or capable of passing, naturally from parent to offspring through the genes: Blue eyes are hereditary in our family. Compare congenital.
- nonhistorical — Not based on or drawn from history.
- nonhysterical — not hysterical or funny
- nonpathogenic — Pathology. capable of producing disease: pathogenic bacteria.
- nontheatrical — not relating to the theatre
- north african — the northern part of Africa, especially the region north of the tropical rain forest and comprised of Morocco, Algeria, Tunisia, Libya, and that part of Egypt west of the Gulf of Suez.
- north america — the northern continent of the Western Hemisphere, extending from Central America to the Arctic Ocean. Highest point, Mt. McKinley, 20,300 feet (6187 meters); lowest, Death Valley, 276 feet (84 meters) below sea level. About 9,360,000 sq. mi. (24,242,400 sq. km).
- north chicago — a city in NE Illinois, on Lake Michigan.
- north ossetia — an autonomous republic in S European Russia, in the N Caucasus. 3100 sq. mi. (8029 sq. km) Capital: Vladikavkaz.
- north reading — a city in NE Massachusetts.
- north sea oil — oil extracted from deposits beneath the North Sea
- north vietnam — that part of Vietnam N of about 17° N; formerly a part of French Indochina; separate republic 1954–75.
- nothing loath — willing
- ochlocratical — Pertaining to ochlocracy.
- off the chain — wildly entertaining
- off the rails — into or in a state of dysfunction or disorder
- oklahoma city — a city in and the capital of Oklahoma, in the central part.
- on a par with — If you say that two people or things are on a par with each other, you mean that they are equally good or bad, or equally important.
- on the parish — receiving parochial relief
- onychophagist — the practice of biting one's nails, especially when done habitually and as a symptom of emotional disturbance.
- 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.
- opisthography — the practice of writing on the front and back of a parchment or papyrus
- oprahfication — the perceived increase in people’s desire to discuss their emotions or personal problems, attributed to the influence of confessional television programmes
- optic chiasma — a site at the base of the forebrain where the inner half of the fibers of the left and right optic nerves cross to the opposite side of the brain.
- 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.
- orchestra pit — musicians' seating in front of stage
- orchestra-pit — a group of performers on various musical instruments, including especially stringed instruments of the viol class, clarinets and flutes, cornets and trombones, drums, and cymbals, for playing music, as symphonies, operas, popular music, or other compositions.
- orchestralist — a person who writes or arranges orchestral music
- orchestrating — Present participle of orchestrate.
- orchestration — (uncountable) the arrangement of music for performance by an orchestra.
- organ whistle — a steam or air whistle in which the jet is forced up against the thin edge of a pipe closed at the top.
- organolithium — (organic chemistry) Describing any organic compound containing a carbon to lithium bond.
- ornithischian — any herbivorous dinosaur of the order Ornithischia, having a pelvis resembling that of a bird. Compare saurischian.
- ornithomantic — relating to ornithomancy
- ornithophobia — Fear of birds.
- orthocephalic — having a medium or intermediate relation between the height of the skull and the breadth or length.
- orthodiagonal — the axis in a crystal
- orthoepically — In terms of correct pronunciation.
- orthogonalise — to make (vectors, functions, etc.) orthogonal.
- orthogonality — (mathematics, statistics) the property of being orthogonal.
- orthogonalize — to make (vectors, functions, etc.) orthogonal.
- orthographies — Plural form of orthography.