13-letter words containing m, r, s, a
- amphitheaters — Plural form of amphitheater.
- amphitheatres — Plural form of amphitheatre.
- amphitrichous — having a single flagellum at each end.
- amphotericins — Plural form of amphotericin.
- anagrammatise — To produce an anagram of (a piece of text).
- anagrammatism — The creation of anagrams.
- anagrammatist — A creator (finder) of anagrams, one who comes up with anagrams.
- ancus marcius — a king of Rome, during whose reign the first bridge across the Tiber was constructed.
- androcentrism — centered on, emphasizing, or dominated by males or masculine interests: an androcentric society; an androcentric religion.
- androdioecism — the state of being androdioecious
- angiosarcomas — Plural form of angiosarcoma.
- angiospermous — of or relating to an angiosperm; having enclosed seeds.
- Ångstrom unit — a unit of length equal to 10 −10 metre, used principally to express the wavelengths of electromagnetic radiations. It is equivalent to 0.1 nanometre
- animadversion — criticism or censure
- animal rights — People who are concerned with animal rights believe very strongly that animals should not be exploited or harmed by humans.
- animal starch — glycogen.
- anise camphor — anethole.
- anisometropia — an imbalance in the power of the two eyes to refract light
- anisometropic — relating to anisometropia
- ante-christum — before Christ. Abbreviation: A.C.
- anti-macassar — a small covering, usually ornamental, placed on the backs and arms of upholstered furniture to prevent wear or soiling; a tidy.
- antiformalist — opposed to formalism
- antimacassars — Plural form of antimacassar.
- antimodernism — modern character, tendencies, or values; adherence to or sympathy with what is modern.
- antimodernist — opposed to modernism
- antireformers — Plural form of antireformer.
- 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
- aperture mask — a perforated metal plate situated behind the faceplate of a color television picture tube and having holes aligned to insure that each of three electron beams strikes only its corresponding red, green, or blue phosphor dot.
- apogeotropism — negative geotropism, as shown by plant stems
- aqueous humor — a watery fluid in the space between the cornea and the lens of the eye
- 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.
- archeptolemus — (in the Iliad) the son of Iphitus who served as a charioteer for Hector.
- aristocratism — the principles of aristocrats
- 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
- armistice day — the anniversary of the signing of the armistice that ended World War I, on Nov 11, 1918, now kept on Remembrance Sunday
- armored scale — any of a family (Diaspididae) of scale insects characterized by a hard, waxy secretion that covers the body: many armored scales are serious pests of trees and shrubs
- 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.
- ascertainment — to find out definitely; learn with certainty or assurance; determine: to ascertain the facts.
- assembly room — a room used as a public place of entertainment, usually dating from the eighteenth or nineteenth century
- astrodynamics — the study of the motion of natural and artificial bodies in space
- asylum seeker — An asylum seeker is a person who is trying to get asylum in a foreign country.
- atmospherical — pertaining to, existing in, or consisting of the atmosphere: atmospheric vapors.
- attested form — a linguistic form that can be shown to be in use or in written records
- 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
- autoeroticism — the arousal and use of one's own body as a sexual object, as through masturbation
- autumn crocus — a liliaceous plant, Colchicum autumnale, of Europe and N Africa having pink or purplish autumn flowers