12-letter words containing r, o, t, h
- orthoclastic — (of a crystal) having cleavages at right angles to each other.
- orthocousins — the children of two brothers or two sisters
- orthodontics — the branch of dentistry dealing with the prevention and correction of irregular teeth, as by means of braces.
- orthodontist — the branch of dentistry dealing with the prevention and correction of irregular teeth, as by means of braces.
- orthodonture — orthodontia (def 2).
- orthodox jew — a Jew who adheres faithfully to the principles and practices of traditional Judaism as evidenced chiefly by a devotion to and study of the Torah, daily synagogue attendance if possible, and strict observance of the Sabbath, religious festivals, holy days, and the dietary laws.
- orthodromics — the act or art of sailing on a great circle
- orthoformate — an ester of orthoformic acid.
- orthogenesis — Biology. Also called orthoselection. evolution of a species proceeding by continuous structural changes in a single lineage without presenting a branching pattern of descent. a theory that the evolution of a species in a continuous, nonbranching manner is due to a predetermined series of alterations intrinsic to the species and not subject to natural selection.
- orthogenetic — pertaining to or exhibiting orthogenesis.
- orthognathic — straight-jawed; having the profile of the face vertical or nearly so; having a gnathic index below 98.
- orthogonally — Mathematics. Also, orthographic. pertaining to or involving right angles or perpendiculars: an orthogonal projection. (of a system of real functions) defined so that the integral of the product of any two different functions is zero. (of a system of complex functions) defined so that the integral of the product of a function times the complex conjugate of any other function equals zero. (of two vectors) having an inner product equal to zero. (of a linear transformation) defined so that the length of a vector under the transformation equals the length of the original vector. (of a square matrix) defined so that its product with its transpose results in the identity matrix.
- orthographer — a person versed in orthography or spelling.
- orthographic — of or relating to orthography.
- orthopaedics — (used with a singular verb) the medical specialty concerned with correction of deformities or functional impairments of the skeletal system, especially the extremities and the spine, and associated structures, as muscles and ligaments.
- orthopaedist — Alternative spelling of orthopedist.
- orthopedical — (American spelling) Alternative form of orthopaedical.
- orthopterans — Plural form of orthopteran.
- orthopterist — someone who studies the Orthoptera
- orthopteroid — (zoology) Any of the insects historically included in the order Orthoptera, including the cockroaches, earwigs, praying mantises, etc.
- orthopterous — belonging or pertaining to the Orthoptera, an order of insects, including the cockroaches, mantids, walking sticks, crickets, grasshoppers, and katydids, characterized by leathery forewings, membranous hind wings, and chewing mouthparts.
- orthorhombic — noting or pertaining to a system of crystallization characterized by three unequal axes intersecting at right angles; rhombic; trimetric.
- orthosilicic — (chemistry) Of, relating to or derived from orthosilicic acid.
- orthotonesis — accentuation of a proclitic or enclitic
- orthotropism — Botany. orthotropic tendency or growth.
- orthotropous — Botany. (of an ovule) straight and symmetrical, with the chalaza at the evident base and the micropyle at the opposite extremity.
- orthovanadic — relating to orthovanadates
- ostrich fern — a tall North American fern, Matteuccia struthiopteris, with large mature leaves that resemble ostrich plumes, a popular landscaping plant whose curled new leaves, called fiddleheads, are eaten as a vegetable.
- other income — Other income is income that does not come from a company's main business, such as interest.
- otherworldly — of, relating to, or devoted to another world, as the world of imagination or the world to come.
- out of hours — Something that happens out of hours happens at a time that is not during the usual hours of business or work.
- out of humor — a comic, absurd, or incongruous quality causing amusement: the humor of a situation.
- out of reach — beyond arm's length
- outstretched — to stretch forth; extend: to outstretch one's hand in welcome.
- outthrusting — Present participle of outthrust.
- over the top — the highest or loftiest point or part of anything; apex; summit. Synonyms: zenith, acme, peak, pinnacle, vertex. Antonyms: bottom, base, foot, lowest point.
- over-fraught — Archaic. filled or laden (with): ships fraught with precious wares.
- over-the-air — of or relating to any means of broadcast transmission.
- over-the-top — the highest or loftiest point or part of anything; apex; summit. Synonyms: zenith, acme, peak, pinnacle, vertex. Antonyms: bottom, base, foot, lowest point.
- overemphatic — excessive or undue emphasis.
- overlengthen — to extend excessively
- overnighting — for or during the night: to stay overnight.
- overscutched — overworked; worn out
- overshipment — an act or instance of shipping freight or cargo.
- overweighted — weighing too much or more than is considered normal, proper, etc.: overweight luggage; an overweight patient; two letters that may be overweight.
- overwithhold — to withhold too much.
- oyster shell — oyster's hard outer covering
- oyster white — a slightly grayish white; off-white.
- ozonic ether — a solution of hydrogen peroxide in ethyl ether.
- palatography — a technique for observing the position of the tongue in relation to the palate during articulation, especially by placing powder or dye on the palate and then noting the area from which it has been removed by the contact of the tongue with the palate during the production of a speech sound.