ax·is
(ăk′sĭs)n. pl. ax·es (ăk′sēz′) 1. A straight line about which a body or geometric object rotates or may be conceived to rotate.
2. Mathematics a. An unlimited line, half-line, or line segment serving to orient a space or a geometric object, especially a line about which the object is symmetric.
b. A reference line from which distances or angles are measured in a coordinate system.
3. A center line to which parts of a structure or body may be referred.
4. An imaginary line to which elements of a work of art, such as a picture, are referred for measurement or symmetry.
5. Anatomy a. The second cervical vertebra on which the head turns.
b. Any of various central structures, such as the spinal column, or standard abstract lines used as a positional referent.
6. Botany The main stem or central part about which organs or plant parts such as branches are arranged.
7. One of three mutually perpendicular lines that define the orientation of an aircraft, with one being along its direction of travel and the other two being perpendicular to the direction of travel.
8. A line through the optical center of a lens that is perpendicular to both its surfaces.
9. One of three or four imaginary lines used to define the faces of a crystal and the position of its atoms.
10. a. An alliance of powers, such as nations, to promote mutual interests and policies.
b. Axis The alliance of Germany and Italy in 1936, later including Japan and other nations, that opposed the Allies in World War II.
[Middle English, from Latin.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
axis
(ˈæksɪs) n,
pl axes (
ˈæksiːz)
1. (Mathematics) a real or imaginary line about which a body, such as an aircraft, can rotate or about which an object, form, composition, or geometrical construction is symmetrical
2. (Mathematics) one of two or three reference lines used in coordinate geometry to locate a point in a plane or in space
3. (Anatomy)
anatomy the second cervical vertebra. Compare
atlas3 4. (Botany) botany the main central part of a plant, typically consisting of the stem and root, from which secondary branches and other parts develop
5. (Government, Politics & Diplomacy) an alliance between a number of states to coordinate their foreign policy
6. (General Physics) optics Also called: principal axis the line of symmetry of an optical system, such as the line passing through the centre of a lens
7. (Geological Science) geology an imaginary line along the crest of an anticline or the trough of a syncline
8. (General Physics) crystallog one of three lines passing through the centre of a crystal and used to characterize its symmetry
[C14: from Latin: axletree, earth's axis; related to Greek axōn axis]
axis
(ˈæksɪs) n,
pl axises (Animals) any of several S Asian deer of the genus Axis, esp A. axis. They typically have a reddish-brown white-spotted coat and slender antlers
[C18: from Latin: Indian wild animal, of uncertain identity]
Axis
(ˈæksɪs) n (Historical Terms)
a. the Axis the alliance of Nazi Germany, Fascist Italy, and Japan, established in 1936 and lasting until their defeat in World War II
b. (as modifier): the Axis powers.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ax•is
(ˈæk sɪs)
n., pl. ax•es (ˈæk siz) 1. the line about which a rotating body, such as the earth, turns.
2. a. a central line that bisects a two-dimensional body or figure.
b. a line about which a three-dimensional body or figure is symmetrical.
c. any line used as a fixed reference for determining the position of a point or series of points, as the x- or y-axis in a system of Cartesian coordinates.
3. Anat. a. a central or principal structure about which something turns or is arranged: the skeletal axis.
b. the second cervical vertebra.
4. Bot. a. the main support of a plant; the stem and root.
b. the main support of an inflorescence.
5. an imaginary line, in a given formal structure, about which a form, area, or plane is organized.
6. the Axis, (in World War II) the nations that fought against the Allies: Germany, Italy, Japan, and others.
7. an alliance of two or more nations to coordinate their foreign and military policies.
8. a principal line of development, movement, etc.
[1540–50; < Latin axis an axletree, axle, axis; Greek áxōn, Sktákṣas]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ax·is
(ăk′sĭs) Plural axes (ăk′sēz′) 1. An imaginary line around which an object rotates. In a rotating sphere, such as the Earth and other planets, the two ends of the axis are called poles.
2. Mathematics a. A line, ray, or line segment with respect to which a figure or object is symmetrical.
b. In the Cartesian coordinate system, one of the reference lines from which or along which distances or angles are measured: the x-axis.
3. Anatomy The second cervical vertebra on which the head turns.
4. Botany The main stem or central part of a plant, about which plant parts, such as branches, are arranged.
axial adjective
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
axis
In land warfare, the general direction of movement, planned or achieved, usually between assigned boundaries.
Dictionary of Military and Associated Terms. US Department of Defense 2005.
Axis
the association of the countries that formed the German/Italian/Japanese alliance in World War II.Dictionary of Collective Nouns and Group Terms. Copyright 2008 The Gale Group, Inc. All rights reserved.
axis
A national alliance to co-ordinate foreign policy, specifically the pact between Hitler and Mussolini in 1937.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited