13-letter words containing a, i, r, m
- antiritualism — opposed to ritualism
- antisubmarine — (of weapons, missiles, etc) designed to combat or destroy submarines
- antisymmetric — (of a relation) never holding between a pair of arguments x and y when it holds between y and x except when x = y, as "…is no younger than…"
- antiterrorism — opposed to or acting against terrorism; counterterrorist
- apogeotropism — negative geotropism, as shown by plant stems
- apoplectiform — of or resembling apoplexy or stroke.
- apparent time — Astronomy. local time measured by the hour angle of the sun.
- apportionment — the act of apportioning
- approximately — close to; around; roughly or in the region of
- approximating — Present participle of approximate.
- approximation — An approximation is a fact, object, or description which is similar to something else, but which is not exactly the same.
- approximative — (of a method, description, etc.) giving only an approximation to something.
- arab-american — a citizen or resident of the U.S. of Arab birth or descent.
- arabian camel — a domesticated camel, Camelus dromedarius, having one hump on its back and used as a beast of burden in the hot deserts of N Africa and SW Asia
- araeometrical — relating to araeometry
- archaeometric — relating to archaeometry
- archaic smile — a conventional representation of the mouth characterized by slightly upturned corners of the lips, found especially on Greek sculpture produced prior to the 5th century b.c.
- archimandrite — the head of a monastery or a group of monasteries
- argumentation — Argumentation is the process of arguing in an organized or logical way, for example in philosophy.
- argumentative — Someone who is argumentative is always ready to disagree or start quarrelling with other people.
- aristocratism — the principles of aristocrats
- arithmetician — a person skilled in arithmetic
- arithmophobia — the fear of numbers
- arm wrestling — a contest in which two people sit facing each other each with one elbow resting on a table, clasp hands, and each tries to force the other's arm flat onto the table while keeping his own elbow touching the table
- armamentarium — the items that comprise the material and equipment used by a physician in his professional practice
- armistice day — the anniversary of the signing of the armistice that ended World War I, on Nov 11, 1918, now kept on Remembrance Sunday
- 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.
- armstand dive — a dive starting from a handstand at the end of a springboard or a platform with the diver's back to the water.
- aromatization — the conversion of aliphatic or alicyclic compounds to aromatic hydrocarbons.
- ascertainment — to find out definitely; learn with certainty or assurance; determine: to ascertain the facts.
- astrodynamics — the study of the motion of natural and artificial bodies in space
- atmospherical — pertaining to, existing in, or consisting of the atmosphere: atmospheric vapors.
- atomic energy — nuclear energy
- atomic number — the number of protons in the nucleus of an atom of an element
- atomic theory — any theory in which matter is regarded as consisting of atoms, esp that proposed by John Dalton postulating that elements are composed of atoms that can combine in definite proportions to form compounds
- audience room — a room for holding formal interviews or hearings.
- aum shinrikyo — a syncretistic Japanese cult combining elements of Buddhism, Hinduism, and Christianity, founded by Shoko Asahara in 1986; responsible for a number of murders and in particular a nerve-gas attack on the Tokyo underground in 1995
- australianism — the Australian national character or spirit
- autapomorphic — (biology) Describing any characteristic that has evolved in only a single species (or other taxon).
- autoeroticism — the arousal and use of one's own body as a sexual object, as through masturbation
- autoradiogram — autoradiograph
- avant-gardism — the attitudes, techniques, etc., of the cultural avant-garde.
- azurmalachite — a blue-green ornamental stone consisting of a mixture of azurite and malachite.
- baby primrose — a tender primrose, Primula forbesii, native to China and Burma, having white, hairy leaves and rose- or lilac-colored flowers with a yellow center.
- backformation — Alternative spelling of back-formation.
- balmer series — a series of lines in the hydrogen spectrum, discovered by Johann Jakob Balmer (1825–98) in 1885
- balsamiferous — yielding or producing balsam
- bank examiner — a public official appointed under U.S. state or federal laws to inspect and audit the operations and accounts of banks in the examiner's jurisdiction.
- barium yellow — a yellow, crystalline compound, BaCrO 4 , used as a pigment (barium yellow)
- barrier cream — a cream used to protect the skin, esp the hands, from dirt and from the action of oils or solvents