13-letter words containing a, c, o, m
- 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
- assembly code — assembly language
- astrodynamics — the study of the motion of natural and artificial bodies in space
- atamasco lily — any of a genus (Zephyranthes) of bulbous plants of the lily family, with hollow stems, grassy leaves, and funnel-shaped flowers of yellow, pink, red, or purple-tinged white
- 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
- atomic volume — the atomic weight (relative atomic mass) of an element divided by its density
- atomic weapon — a weapon in which energy is provided by nuclear fission
- atomic weight — the weight of one atom of an element expressed in atomic mass units: it is the average weight of all the isotopes of the element
- atomistically — Also called atomic theory. Philosophy. the theory that minute, discrete, finite, and indivisible elements are the ultimate constituents of all matter.
- audience room — a room for holding formal interviews or hearings.
- 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.
- autapomorphic — (biology) Describing any characteristic that has evolved in only a single species (or other taxon).
- autodidactism — Alternative form of autodidacticism.
- autoeroticism — the arousal and use of one's own body as a sexual object, as through masturbation
- automagically — automatically; in a way that is hidden from or not understood by the user, and in that sense, apparently “magical”: I downloaded an app that automagically adds a travel itinerary to my calendar whenever I buy a plane ticket.
- automatically — without volition or from force of habit; mechanically: Whenever I hear that song, I automatically think of my dad.
- automechanism — an automatic mechanical system or component, especially a device that operates automatically under predetermined conditions.
- autonomically — autonomous.
- autoschediasm — anything done with little forethought or preparation
- autumn crocus — a liliaceous plant, Colchicum autumnale, of Europe and N Africa having pink or purplish autumn flowers
- avila camacho — Manuel [mah-nwel] /mɑˈnwɛl/ (Show IPA), 1897–1955, president of Mexico 1940–46.
- axiomatically — pertaining to or of the nature of an axiom; self-evident; obvious.
- baal merodach — Marduk.
- back emission — the secondary emission of electrons from an anode
- back mutation — the reversion of a mutant to the original phenotype
- backformation — Alternative spelling of back-formation.
- badminton cup — a long refreshing drink of claret with soda water and sugar
- 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.
- 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
- bedroom farce — a light comedy about sexual relationships
- bimolecularly — in a bimolecular fashion
- bioaccumulate — (of substances, esp toxins) to build up within the tissues of organisms
- biochemically — the science dealing with the chemistry of living matter.
- biocompatible — not rejected by the body
- biomechanical — relating to biomechanics
- biosystematic — relating to biosystematics
- black diamond — coal (sense 1)
- black economy — The black economy consists of the buying, selling, and producing of goods or services that goes on without the government being informed, so that people can avoid paying tax on them.
- blastomycosis — a fungal infection particularly affecting the lungs
- block diagram — a diagram showing the interconnections between the parts of an industrial process
- bombastically — (of speech, writing, etc.) high-sounding; high-flown; inflated; pretentious.
- bomber jacket — A bomber jacket is a short jacket which is gathered into a band at the waist or hips.
- bootlace worm — a nemertean worm, Lineus longissimus, that inhabits shingly shores and attains lengths of over 6 m (20 ft)
- bowling match — a game of bowls
- brace molding — keel1 (def 6).
- cable molding — a molding in the form of a rope.
- caesaropapism — the theory that the state should have authority over the church in ecclesiastical matters; Erastianism