13-letter words containing g, r, o, i
- archaeologian — (archaic) An archaeologist.
- archaeologist — a specialist in archaeology, the scientific study of prehistoric peoples and their cultures by analysis of their artifacts, inscriptions, monuments, etc.
- archeological — of or relating to archaeology.
- archeologists — archaeology.
- archipelagoes — Plural form of archipelago.
- arcticologist — a person who specializes in arcticology.
- argentiferous — containing or bearing silver
- argilliferous — containing or yielding clay
- argumentation — Argumentation is the process of arguing in an organized or logical way, for example in philosophy.
- armor-plating — The armor-plating on a vehicle or building is the hard metal covering that is intended to protect it from gunfire and other missiles.
- arshile gorky — Arshile [ahr-sheel] /ˈɑr ʃil/ (Show IPA), (Vosdanig Adoian) 1904–48, American painter, born in Armenia.
- arteriography — the X-ray examination of an artery or arterial system after injection of a contrast medium into the bloodstream
- aryepiglottic — pertaining to or connecting the arytenoid cartilage and the epiglottis.
- aspergillosis — a rare fungal infection, esp of the mucous membranes or lungs, caused by various species of Aspergillus
- assyriologist — A person who studies ancient Assyria.
- astereognosis — inability to recognize objects by touch
- athenagoras i — (Aristocles Spyrou) 1886–1972, Archbishop Ecumenical of Constantinople and Ecumenical Patriarch of the Greek Orthodox Church 1948–72.
- atherogenesis — (medicine) The formation of atheromas, especially on the walls of the arteries.
- atomic energy — nuclear energy
- auctioneering — Present participle of auctioneer.
- audiographics — audiographic teleconferencing
- autobiography — Your autobiography is an account of your life, which you write yourself.
- autographical — Relating to, or used in, the process of autography.
- autoradiogram — autoradiograph
- bachelor girl — a young unmarried woman, esp one who is self-supporting
- backgrounding — Present participle of background.
- backing group — a group of musicians providing an instrumental or vocal accompaniment for a pop singer
- backing store — a computer storage device, usually a disk, that provides additional storage space for information so that it can be accessed and referred to when required and may be copied into the processor if needed
- bacteriogenic — Caused by bacteria.
- bacteriologic — a branch of microbiology dealing with the identification, study, and cultivation of bacteria and with their applications in medicine, agriculture, industry, and biotechnology.
- bacteriophage — a virus that is parasitic in a bacterium and multiplies within its host, which is destroyed when the new viruses are released
- bacteriophagy — the action of a bacteriophage
- bag of tricks — a container or receptacle of leather, plastic, cloth, paper, etc., capable of being closed at the mouth; pouch.
- baking powder — Baking powder is an ingredient used in cake making. It causes cakes to rise when they are in the oven.
- banking hours — the hours during which a bank is open for business
- bargain offer — something for sale at a low price
- batting order — the sequence in which hitters will bat in a given game, determined in advance by the team manager.
- be hard going — If you say that something is hard going, you mean it is difficult and requires a lot of effort.
- bearing sword — a large sword carried for its owner by a squire or servant because of its size.
- beg to differ — politely disagree
- beige toaster — Macintosh
- benching iron — a triangular, pronged plate driven into the ground to provide a temporary bench mark or turning point.
- bergamot mint — an aromatic herb, Mentha piperita citrata, having a lemonlike odor when crushed.
- bibliographer — an expert in bibliography
- bibliographic — a complete or selective list of works compiled upon some common principle, as authorship, subject, place of publication, or printer.
- big brown bat — any of several small to medium-sized common bats of the genera Myotis and Eptesicus, found worldwide in caves, trees, and buildings, including M. lucifugus (little brown bat) and E. fuscus (big brown bat) a widespread North American species.
- bighorn-river — a river flowing from central Wyoming to the Yellowstone River in S Montana. 336 miles (540 km) long.
- bildungsroman — a novel concerned with a person's formative years and development
- bio-autograph — an analytical technique in which organic compounds are separated by chromatography and identified by studying their effects on microorganisms.
- bioautography — an analytical technique in which organic compounds are separated by chromatography and identified by studying their effects on microorganisms.