12-letter words containing r, o, t, a, l
- obligatorily — required as a matter of obligation; mandatory: A reply is desirable but not obligatory.
- obliterating — Present participle of obliterate.
- obliteration — the act of obliterating or the state of being obliterated.
- obliterative — Tending or serving to obliterate.
- octahedrally — in an octahedral manner
- oil platform — An oil platform is a structure that is used when getting oil from the ground under the sea.
- oil terminal — a large industrial complex where oil is stored and from which oil is transported elsewhere; an oil depot
- old favorite — If you refer to something as an old favorite, you mean that it has been in existence for a long time and everyone knows it or likes it.
- olfactometer — a device for estimating the keenness of the sense of smell.
- olfactometry — The study and measurement of smells.
- olfactronics — the measurement and analysis of smells through instruments
- on the alert — fully aware and attentive; wide-awake; keen: an alert mind.
- ooze leather — leather prepared from calfskin or other skin and having a soft, velvety finish on the flesh side.
- open slather — to spread or apply thickly: to slather butter on toast.
- open trailer — any dog that barks or bays on the trail of its quarry.
- operatically — of or relating to opera: operatic music.
- operatorless — Without an operator (person who operates); fully automatic.
- ophiolatrous — of, relating to, or practising snake-worshipping
- optical grep — vgrep
- optoisolator — A device that transmits a signal optically between two isolated electronic circuits.
- optometrical — the practice or profession of examining the eyes, by means of suitable instruments or appliances, for defects in vision and eye disorders in order to prescribe corrective lenses or other appropriate treatment.
- 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.
- oral society — a society that has not developed literacy
- oratorically — of, relating to, or characteristic of an orator or oratory: His oratorical prowess has led to political success.
- orbicularity — The quality of being orbicular.
- orbital road — a highway that circles a metropolitan area; ring road
- orchestrally — In an orchestral manner.
- oregon trail — a route used during the U.S. westward migrations, especially in the period from 1840 to 1860, starting in Missouri and ending in Oregon. About 2000 miles (3200 km) long.
- organoleptic — perceived by a sense organ.
- oriental rug — a rug or carpet woven usually in Asia and characterized by hand-knotted pile.
- ornamentally — In an ornamental way.
- ornithogalum — any plant of the genus Ornithogalum
- 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.
- outer planet — any of the four planets with orbits outside the orbit of Mars, namely, the planets Jupiter, Saturn, Uranus, and Neptune.
- outgeneraled — Simple past tense and past participle of outgeneral.
- outrageously — In an outrageous manner; to an outrageous degree.
- over-inflate — to distend; swell or puff out; dilate: The king cobra inflates its hood.
- over-reliant — having or showing dependence: reliant on money from home.
- overcritical — excessively critical; hypercritical.
- overdelicate — extremely or excessively delicate: an overdelicate digestive system.
- overliterary — excessively literary
- overpopulate — to fill with an excessive number of people, straining available resources and facilities: Expanding industry has overpopulated the western suburbs.
- overregulate — to apply rules and regulations excessively to (something)
- ovolactarian — lacto-ovo-vegetarian.
- oyster plant — salsify.
- pain control — methods for the relief and management of pain
- paint roller — a roller of absorbent material, mounted on a handle, that is rolled in a trough of paint and then rolled over a flat surface to be painted.
- 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.