AXISES
Etymology 1
See axis
Noun
axises
Misspelling of axes. Mistakenly used for the plural of axis (“line around which object rotates”).
Etymology 2
See axis
Noun
axises
plural of axis (type of deer)
Source: Wiktionary
AXIS
Ax"is, n. Etym: [L.] (Zoöl.)
Definition: The spotted deer (Cervus axis or Axis maculata) of India, where
it is called hog deer and parrah (Moorish name).
Ax"is, n.; pl. Axes. Etym: [L. axis axis, axle. See Axle.]
Definition: A straight line, real or imaginary, passing through a body, on
which it revolves, or may be supposed to revolve; a line passing
through a body or system around which the parts are symmetrically
arranged.
2. (Math.)
Definition: A straight line with respect to which the different parts of a
magnitude are symmetrically arranged; as, the axis of a cylinder, i.
e., the axis of a cone, that is, the straight line joining the vertex
and the center of the base; the axis of a circle, any straight line
passing through the center.
3. (Bot.)
Definition: The stem; the central part, or longitudinal support, on which
organs or parts are arranged; the central line of any body. Gray.
4. (Anat.)
(a) The second vertebra of the neck, or vertebra dentata.
(b) Also used of the body only of the vertebra, which is prolonged
anteriorly within the foramen of the first vertebra or atlas, so as
to form the odontoid process or peg which serves as a pivot for the
atlas and head to turn upon.
5. (Crystallog.)
Definition: One of several imaginary lines, assumed in describing the
position of the planes by which a crystal is bounded.
6. (Fine Arts)
Definition: The primary of secondary central line of any design. Anticlinal
axis (Geol.), a line or ridge from which the strata slope downward on
the two opposite sides.
– Synclinal axis, a line from which the strata slope upward in
opposite directions, so as to form a valley.
– Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band, axial fiber,
and cylinder axis.
– Axis in peritrochio, the wheel and axle, one of the mechanical
powers.
– Axis of a curve (Geom.), a straight line which bisects a system
of parallel chords of a curve; called a principal axis, when cutting
them at right angles, in which case it divides the curve into two
symmetrical portions, as in the parabola, which has one such axis,
the ellipse, which has two, or the circle, which has an infinite
number. The two axes of the ellipse are the major axis and the minor
axis, and the two axes of the hyperbola are the transverse axis and
the conjugate axis.
– Axis of a lens, the straight line passing through its center and
perpendicular to its surfaces.
– Axis of a telescope or microscope, the straight line with which
coincide the axes of the several lenses which compose it.
– Axes of coördinates in a plane, to straight lines intersecting
each other, to which points are referred for the purpose of
determining their relative position: they are either rectangular or
oblique.
– Axes of coördinates in space, the three straight lines in which
the coördinate planes intersect each other.
– Axis of a balance, that line about which it turns.
– Axis of oscillation, of a pendulum, a right line passing through
the center about which it vibrates, and perpendicular to the plane of
vibration.
– Axis of polarization, the central line around which the prismatic
rings or curves are arranged. Brewster.
– Axis of revolution (Descriptive Geom.), a straight line about
which some line or plane is revolved, so that the several points of
the line or plane shall describe circles with their centers in the
fixed line, and their planes perpendicular to it, the line describing
a surface of revolution, and the plane a solid of revolution.
– Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when folded
over along the axis, shall coincide with the other part.
– Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies), the
diameter of the sphere which is perpendicular to the plane of the
circle. Hutton.
– Axis of the Ionic capital (Arch.), a line passing perpendicularly
through the middle of the eye of the volute.
– Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression, exerted by the
fibers in any cross section of a girder.
– Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All crystals, not of
the isometric system, are either uniaxial or biaxial.
– Optic axis, Visual axis (Opt.), the straight line passing through
the center of the pupil, and perpendicular to the surface of the eye.
– Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such that the
tangents from any point of it to the two circles shall be equal to
each other.
– Spiral axis (Arch.), the axis of a twisted column drawn spirally
in order to trace the circumvolutions without.
– Axis of abscissas and Axis of ordinates. See Abscissa.
Source: Webster’s Unabridged Dictionary 1913 Edition