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Caustic surface
(gcide) | Surface \Sur"face`\, n. [F. See Sur-, and Face, and cf.
Superficial.]
1. The exterior part of anything that has length and breadth;
one of the limits that bound a solid, esp. the upper face;
superficies; the outside; as, the surface of the earth;
the surface of a diamond; the surface of the body.
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The bright surface of this ethereous mold. --Milton.
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2. Hence, outward or external appearance.
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Vain and weak understandings, which penetrate no
deeper than the surface. --V. Knox.
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3. (Geom.) A magnitude that has length and breadth without
thickness; superficies; as, a plane surface; a spherical
surface.
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4. (Fort.) That part of the side which is terminated by the
flank prolonged, and the angle of the nearest bastion.
--Stocqueler.
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Caustic surface, Heating surface, etc. See under
Caustic, Heating, etc.
Surface condensation, Surface condenser. See under
Condensation, and Condenser.
Surface gauge (Mach.), an instrument consisting of a
standard having a flat base and carrying an adjustable
pointer, for gauging the evenness of a surface or its
height, or for marking a line parallel with a surface.
Surface grub (Zool.), the larva of the great yellow
underwing moth (Triphoena pronuba). It is often
destructive to the roots of grasses and other plants.
Surface plate (Mach.), a plate having an accurately dressed
flat surface, used as a standard of flatness by which to
test other surfaces.
Surface printing, printing from a surface in relief, as
from type, in distinction from plate printing, in which
the ink is contained in engraved lines.
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Caustic surface
(gcide) | Caustic \Caus"tic\, Caustical \Caus"tic*al\, a. [L. caustucs,
Ge. ?, fr. ? to burn. Cf. Calm, Ink.]
1. Capable of destroying the texture of anything or eating
away its substance by chemical action; burning; corrosive;
searing.
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2. Severe; satirical; sharp; as, a caustic remark.
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Caustic curve (Optics), a curve to which the ray of light,
reflected or refracted by another curve, are tangents, the
reflecting or refracting curve and the luminous point
being in one plane.
Caustic lime. See under Lime.
Caustic potash, Caustic soda (Chem.), the solid
hydroxides potash, KOH, and soda, NaOH, or solutions
of the same.
Caustic silver, nitrate of silver, lunar caustic.
Caustic surface (Optics), a surface to which rays reflected
or refracted by another surface are tangents. Caustic
curves and surfaces are called catacaustic when formed by
reflection, and diacaustic when formed by refraction.
Syn: Stinging; cutting; pungent; searching.
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