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Dictionary Suite
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automobile a four-wheeled vehicle with a built-in, self-propelled motor requiring a driver and used on roads to carry people; passenger car.
automotive of or pertaining to automobiles. [2 definitions]
autonetics (used with a sing. verb) the science of the use and development of automated devices used for control and guidance.
autonomic occurring or acting involuntarily or independently; automatic. [3 definitions]
autonomic nervous system the part of the nervous system in vertebrates that controls involuntary bodily processes, such as the operation of the heart, stomach, and glands; sympathetic and parasympathetic nervous systems together.
autonomous free and independent, as a state or an organism; self-governing.
autonomy freedom and independence; self-governance. [2 definitions]
autopilot shortened form of "automatic pilot."
autopsy a superficial and surgical examination of a corpse, usu. to find the cause of death. [2 definitions]
autoradiograph a picture produced on a film by placing it in contact with a radioactive substance.
auto-rickshaw a small, three-wheeled, motorized vehicle used as a taxi.
autosome any of an organism's chromosomes except the two involved in sex determination.
autosuggestion in psychology, a technique of changing one's own behavior or beliefs by repeating certain phrases or ideas to oneself.
autotoxemia see "autointoxication."
autumn the season of the year between summer and winter, in the northern hemisphere continuing from the September equinox to the December solstice; fall.
autumnal pertaining to or characteristic of autumn. [2 definitions]
aux. abbreviation of "auxiliary," a person or thing that helps, assists, or supports, or a person or group that is subordinate or supplementary.
auxiliary serving to help, assist, or support. [7 definitions]
auxiliary verb a verb used in conjunction with a main verb in a clause that assists the main verb in reflecting aspects, voices, moods, and tenses. In the sentence "They have escaped," the main verb is "escaped," and the auxiliary verb is "have."
auxin any of a group of organic compounds, often plant hormones, that affect plant growth.
AV abbreviation of "audio-visual," having both sound and a picture, as does film.