16-letter words containing o, r, a, i
- radio microphone — a microphone incorporating a radio transmitter so that the user can move around freely
- radio-controlled — A radio-controlled device works by receiving radio signals which operate it.
- radio-phonograph — a radio and phonograph combined in one unit and sharing some components, as the amplifier and speaker(s)
- radiographically — the production of radiographs.
- radioimmunoassay — a test procedure that integrates immunologic and radiolabeling techniques to measure minute quantities of a substance, as a protein, hormone, or drug, in a given sample of body fluid or tissue.
- radiosymmetrical — radially symmetrical.
- radiotransparent — transparent to radiation; invisible in x-ray photographs and under fluoroscopy (opposed to radiopaque).
- radium emanation — (formerly) radon.
- radius of action — the maximum distance that a ship, aircraft, or land vehicle can travel from its base and return without refuelling
- railroad station — railway station, train stop
- rainbow lorikeet — a small Australasian parrot, Trichoglossus haematodus, with brightly-coloured plumage
- rainbow seaperch — an embiotocid fish, Hypsurus caryi, living off the Pacific coast of North America, having red, orange, and blue stripes on the body.
- raise an eyebrow — If something causes you to raise an eyebrow or to raise your eyebrows, it causes you to feel surprised or disapproving.
- rambunctiousness — difficult to control or handle; wildly boisterous: a rambunctious child.
- ramen profitable — If a startup business is ramen profitable, it is barely profitable, just enough to allow the founder to live on the cheapest diet.
- random vibration — Random vibration is a type of forced vibration in which the motion follows no regular pattern.
- rating community — an online community based around a website that allows members to rate each other's photographs, qualifications, etc, as well as those of applicants, and which only those approved by existing members are allowed to join
- rational fortran — (language) (RATFOR) Brian Kernighan's Fortran preprocessor that allows programming with C-like control flow. RATFOR is mainly of historical significance. A translator from Ratfor to Fortran IV was posted to comp.sources.Unix volume 13.
- rational horizon — the line or circle that forms the apparent boundary between earth and sky.
- rattle around in — to live or work in (a house, office, etc.) that is too big for one's needs
- razor-billed auk — a black and white auk, Alca torda, of the American and European coasts of the northern North Atlantic, having a compressed black bill encircled by a white band.
- re-accreditation — to ascribe or attribute to (usually followed by with): He was accredited with having said it.
- re-apportionment — the act of redistributing or changing the apportionment of something.
- re-appropriation — the act of appropriating.
- reaction chamber — the chamber in a rocket engine in which the reaction or combustion of fuel occurs
- reaction turbine — a turbine driven by the reactive force of a fluid passing through the rotor blades.
- rear-view mirror — a mirror mounted on the side, windshield, or instrument panel of an automobile or other vehicle to provide the driver with a view of the area behind the vehicle.
- rearguard action — an action fought by a rearguard
- recapitalization — a revision of a corporation's capital structure by an exchange of securities.
- reclassification — categorization in a different way
- reconceptualized — to form into a concept; make a concept of.
- recreational sex — sex for the purpose of pleasure rather than reproduction, without the commitment of a relationship
- rectus abdominis — a long flat muscle that extends along the whole length of both sides of the abdomen. It flexes the vertebral column, particularly the lumbar portion; it also tenses the anterior abdominal wall and assists in compressing the abdominal contents
- redbank whiteoak — a city in S Tennessee.
- redemption value — the price at which the issuing company may choose to repurchase a security before its maturity date
- redistributional — a distribution performed again or anew.
- reflection plane — a plane through a crystal that divides the crystal into two halves that are mirror images of each other.
- reflexive domain — A domain satisfying a recursive domain equation. E.g. D = D -> D.
- refrigerator car — a freight car having either an ice chest or machinery for chilling perishables and sometimes having a heating unit to keep perishables from freezing.
- regional council — the governing body in certain countries of a particular region or administrative division
- regional ileitis — a chronic inflammatory bowel disease that causes scarring and thickening of the intestinal walls and frequently leads to obstruction.
- regional network — mid-level network
- register tonnage — the volume of a vessel, especially the net tonnage as measured officially and registered for purposes of taxation.
- registration fee — a fee paid to register, enrol or sign up for (a course, etc)
- regular gasoline — unleaded gasoline or petrol, as for fuelling a vehicle, etc
- reidentification — an act or instance of identifying; the state of being identified.
- reinsurance pool — the grouping of insurers that provide partial or complete insurance coverage to other insurers for (a risk on which a policy has already been issued)
- reinterpretation — the act of interpreting; elucidation; explication: This writer's work demands interpretation.
- relational model — relational data model
- relative pronoun — one of the pronouns who, whom, which, what, their compounds with -ever or -soever, or that used as the subordinating word to introduce a subordinate clause, especially such a pronoun referring to an antecedent.