12-letter words containing t, r, o, h, l
- ophiolatrous — of, relating to, or practising snake-worshipping
- oral history — information of historical or sociological importance obtained usually by tape-recorded interviews with persons whose experiences and memories are representative or whose lives have been of special significance.
- orchestrally — In an orchestral manner.
- ornithogalum — any plant of the genus Ornithogalum
- ornithophily — pollination of flowers by birds
- ortho-xylene — Chemistry. a clear, colorless, poisonous, flammable liquid, C 8 H 10 , the ortho isomer of xylene: used chiefly in the synthesis of phthalic anhydride.
- orthoclastic — (of a crystal) having cleavages at right angles to each other.
- 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.
- orthopedical — (American spelling) Alternative form of orthopaedical.
- orthosilicic — (chemistry) Of, relating to or derived from orthosilicic acid.
- otherworldly — of, relating to, or devoted to another world, as the world of imagination or the world to come.
- overlengthen — to extend excessively
- overwithhold — to withhold too much.
- oyster shell — oyster's hard outer covering
- 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.
- paranthelion — a bright spot in the sky caused by refraction and occurring at an angular distance from the sun of between 90° and 140°
- parochialist — a parochial character, spirit, or tendency; excessive narrowness of interests or view; provincialism.
- petroglyphic — relating to or having the characteristics of a petroglyph or carving made in rock
- phallocratic — relating to a male, or the beliefs assumed by such, who assumes authority over females due to his maleness
- pharmacolite — hydrous calcium arsenate, 2CaO⋅As 2 O 5 ⋅5H 2 O, formed by natural alteration of mineral deposits containing arsenopyrite and arsenical ores of cobalt and silver.
- philanthropy — altruistic concern for human welfare and advancement, usually manifested by donations of money, property, or work to needy persons, by endowment of institutions of learning and hospitals, and by generosity to other socially useful purposes.
- photo relief — a method of showing the configuration of the relief of an area by photographing a model of it that is illuminated by a lamp in the northwest corner
- photonuclear — of, relating to, or caused by the collision of high-energy photons with the nucleus of an atom.
- photopolymer — a polymer or plastic that undergoes a change in physical or chemical properties when exposed to light.
- photorealism — a style of painting flourishing in the 1970s, especially in the U.S., England, and France, and depicting commonplace scenes or ordinary people, with a meticulously detailed realism, flat images, and barely discernible brushwork that suggests and often is based on or incorporates an actual photograph.
- phragmoplast — the cytoplasmic structure that forms at the equator of the spindle after the chromosomes have divided during the anaphase of plant mitosis, and that initiates cell division.
- phrenologist — a psychological theory or analytical method based on the belief that certain mental faculties and character traits are indicated by the configurations of the skull.
- plasma torch — an electrical device for converting a gas into a plasma, used for melting metal
- play through — to pass another foursome or group with their permission, while playing a round of golf
- ploughwright — a person who makes ploughs
- poikilotherm — an organism with poikilothermic qualities
- polar lights — the aurora borealis in the Northern Hemisphere or the aurora australis in the Southern Hemisphere.
- poll watcher — a representative of a political party or of an organization running a candidate who is assigned to the polls on an election day to watch for violations of the laws that regulate voting, campaigning, etc.
- polygraphist — an instrument for receiving and recording simultaneously tracings of variations in certain body activities.
- polyhistoric — relating to a polyhistor
- polyrhythmic — the simultaneous occurrence of sharply contrasting rhythms within a composition.
- polytriglyph — (in classical architecture) an intercolumniation of at least four triglyphs.
- polyurethane — a thermoplastic polymer containing the group NHCOO: used for padding and insulation in furniture, clothing, and packaging, and in the manufacture of resins for adhesives, elastomers, and fillers.
- porthole die — a die having several openings for the extrusion of separate parts of an object later formed by the welding or fusing together of these parts.
- postbrachial — belonging to the arm, foreleg, wing, pectoral fin, or other forelimb of a vertebrate.
- poster child — a child appearing on a poster for a charitable organization.
- preneolithic — (sometimes lowercase) Anthropology. of, relating to, or characteristic of the last phase of the Stone Age, marked by the domestication of animals, the development of agriculture, and the manufacture of pottery and textiles: commonly thought to have begun c9000–8000 b.c. in the Middle East. Compare Mesolithic, Paleolithic.
- pro-catholic — of or relating to a Catholic church, especially the Roman Catholic Church.
- procathedral — a church used temporarily as a cathedral.
- prophylactic — defending or protecting from disease or infection, as a drug.
- prothalamion — a song or poem written to celebrate a marriage.
- prothalamium — prothalamion.
- pull through — to draw or haul toward oneself or itself, in a particular direction, or into a particular position: to pull a sled up a hill.
- pyritohedral — of or relating to a pyritohedron
- pyrocatechol — catechol.