13-letter words containing a, m, e, s
- 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.
- apicomplexans — Plural form of apicomplexan.
- apogeotropism — negative geotropism, as shown by plant stems
- apologeticism — An instance of the use of apologetics.
- apothegmatise — to speak in apothegms
- apple blossom — the blossom of an apple tree
- 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.
- 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.
- aschelminthes — a major grouping (formerly a phylum) of small-to-microscopic pseudocoelomate organisms, as the rotifers, nematodes, and gastrotriches, all of which are now classified as separate phyla.
- assembly code — assembly language
- assembly hall — a very large room used to hold public meetings, to stage shows, etc
- assembly line — An assembly line is an arrangement of workers and machines in a factory, where each worker deals with only one part of a product. The product passes from one worker to another until it is finished.
- assembly room — a room used as a public place of entertainment, usually dating from the eighteenth or nineteenth century
- assembly time — the time required for a computer to translate symbolic computer language into machine-language instructions.
- assemblywoman — In the United States, an assemblywoman is a female elected member of an assembly of people who make decisions and laws.
- assemblywomen — Plural form of assemblywoman.
- asti spumante — a sweet, sparkling Italian white wine with a muscat flavor.
- astonishments — Plural form of astonishment.
- 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
- augmentations — Plural form of augmentation.
- auguste comte — (Isidore) Auguste (Marie François) [ee-zee-dawr oh-gyst ma-ree frahn-swa] /i ziˈdɔr oʊˈgüst maˈri frɑ̃ˈswa/ (Show IPA), 1798–1857, French founder of the philosophical system of positivism.
- autoeroticism — the arousal and use of one's own body as a sexual object, as through masturbation
- automechanism — an automatic mechanical system or component, especially a device that operates automatically under predetermined conditions.
- autoschediasm — anything done with little forethought or preparation
- baal shem tov — original name Israel ben Eliezer ?1700–60, Jewish religious leader, teacher, and healer in Poland: founder of modern Hasidism
- baal-shem-tov — (Israel ben Eliezer"Besht") c1700–60, Ukrainian teacher and religious leader: founder of the Hasidic movement of Judaism.
- 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.
- back emission — the secondary emission of electrons from an anode
- baggagemaster — a person employed, especially by a railroad, bus company, or steamship line, to take charge of passengers' baggage.
- ballet master — a man who teaches and rehearses the dancers in a ballet company
- balmer series — a series of lines in the hydrogen spectrum, discovered by Johann Jakob Balmer (1825–98) in 1885
- balsam spruce — either of two North American coniferous trees of the genus Picea, P. pungens (the blue spruce) or P. engelmanni
- balsamiferous — yielding or producing balsam
- baluster stem — a stem of a drinking glass or the like having a gradual swelling near the top or bottom.
- band spectrum — a spectrum consisting of a number of bands of closely spaced lines that are associated with emission or absorption of radiation by molecules
- bantamweights — Plural form of bantamweight.
- basement flat — a flat below the ground floor of a building
- basement-rock — the undifferentiated assemblage of rock (basement rock) underlying the oldest stratified rocks in any region: usually crystalline, metamorphosed, and mostly, but not necessarily, Precambrian in age.
- basic plumage — the plumage assumed by an adult bird at its complete, usually annual, molt.
- basidiomycete — any fungus of the phylum Basidiomycota (formerly class Basidiomycetes), in which the spores are produced in basidia. The group includes boletes, puffballs, smuts, and rusts
- bass trombone — the lower-pitched of the two main types of trombone
- bastard amber — a color of gelatin commonly used in stage lighting, similar to light amber but having a pinkish cast.