9-letter words containing a, t, o, p
- autopoint — a point-to-point race in motor cars
- autopsied — inspection and dissection of a body after death, as for determination of the cause of death; postmortem examination.
- autopsies — Plural form of autopsy.
- autopsist — a surgeon who specializes in conducting autopsies
- autoreply — a facility for sending automated replies to email messages
- autoscope — An optical instrument for examining one's own eye.
- autoscopy — the experience of hallucination in which one sees oneself from outside one's own body
- autospore — a nonmotile algal spore that develops adult characteristics before being released
- autotroph — any organism capable of self-nourishment by using inorganic materials as a source of nutrients and using photosynthesis or chemosynthesis as a source of energy, as most plants and certain bacteria and protists.
- auxotroph — a mutant strain of microorganism having nutritional requirements additional to those of the normal organism
- azeotrope — a mixture of liquids that boils at a constant temperature, at a given pressure, without change of composition
- azeotropy — the existence of azeotropes
- baby spot — a small spotlight, usually 250–400 watts, used to highlight a specific section of a stage setting or acting area.
- backstops — Plural form of backstop.
- ballpoint — A ballpoint or a ballpoint pen is a pen with a very small metal ball at the end which transfers the ink from the pen onto a surface.
- barotropy — a state of fluid stratification in which surfaces of constant pressure and others of constant density do not intersect but are parallel.
- betatopic — (of atoms) differing in proton number by one, theoretically as a result of emission of a beta particle
- bicompact — compact1 (def 7).
- bioparent — a biological parent
- biopirate — a person who is responsible for biopiracy
- blow past — To blow out despite a safeguard. "The server blew past the 5K reserve buffer."
- boat trip — a trip in a boat
- body part — a part of a human body
- bonaparte — Jérôme (ʒerom), brother of Napoleon I. 1784–1860, king of Westphalia (1807–13)
- bookplate — A bookplate is a piece of decorated paper which is stuck in the front of a book and on which the owner's name is printed or written.
- boot camp — In the United States, a boot camp is a camp where people who have just joined the army, navy, or marines are trained.
- bootstrap — If you bootstrap an organization or an activity, you set it up or achieve it alone, using very few resources.
- bop stack — A BOP stack is one of two or more units which control well pressure, and contain the wellhead and blowout preventers.
- box pleat — a flat double pleat made by folding under the fabric on either side of it
- cachepots — Plural form of cachepot.
- cacoepist — One who engages in cacoepy, especially frequently.
- cacotopia — a dystopia
- cajeputol — cineole.
- cajuputol — a colorless, oily, slightly water-soluble liquid terpene ether, C 10 H 18 O, having a camphorlike odor and a pungent, spicy, cooling taste, found in eucalyptus, cajeput, and other essential oils: used in flavoring, perfumery, and medicine chiefly as an expectorant.
- calotypes — Plural form of calotype.
- campstool — a lightweight folding stool
- cantalope — Misspelling of cantaloupe.
- capacitor — A capacitor is a device for accumulating electric charge.
- cape town — the legislative capital of South Africa and capital of Western Cape province, situated in the southwest on Table Bay: founded in 1652, the first White settlement in southern Africa; important port. Pop: 3 740 026 (2011)
- caponette — a capon produced by the administration of a synthetic sex hormone.
- caporetto — Italian village (now in Slovenia): scene of a battle of WWI in which the Italian army was defeated by Austro-German forces (1917)
- capotasto — capo1 .
- capstones — Plural form of capstone.
- captioned — Simple past tense and past participle of caption.
- captopril — an ACE inhibitor used to treat high blood pressure and congestive heart failure
- cartopper — an object, esp a small boat, designed to be transported on top of a vehicle
- cashpoint — A cashpoint is the same as a cash dispenser.
- cataphora — the use of a word such as a pronoun that has the same reference as a word used subsequently in the same discourse
- catchpole — (in medieval England) a sheriff's officer who arrested debtors
- catchpoll — (formerly) a petty officer of justice, especially one arresting persons for debt.