Compound \Com"pound\, a. [OE. compouned, p. p. of compounen. See
Compound, v. t.]
Composed of two or more elements, ingredients, parts;
produced by the union of several ingredients, parts, or
things; composite; as, a compound word.
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Compound substances are made up of two or more simple
substances. --I. Watts.
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Compound addition, subtraction, multiplication,
division (Arith.), the addition, subtraction, etc., of
compound numbers.
Compound crystal (Crystallog.), a twin crystal, or one
seeming to be made up of two or more crystals combined
according to regular laws of composition.
Compound engine (Mech.), a form of steam engine in which
the steam that has been used in a high-pressure cylinder
is made to do further service in a larger low-pressure
cylinder, sometimes in several larger cylinders,
successively.
Compound ether. (Chem.) See under Ether.
Compound flower (Bot.), a flower head resembling a single
flower, but really composed of several florets inclosed in
a common calyxlike involucre, as the sunflower or
dandelion.
Compound fraction. (Math.) See Fraction.
Compound fracture. See Fracture.
Compound householder, a householder who compounds or
arranges with his landlord that his rates shall be
included in his rents. [Eng.]
Compound interest. See Interest.
Compound larceny. (Law) See Larceny.
Compound leaf (Bot.), a leaf having two or more separate
blades or leaflets on a common leafstalk.
Compound microscope. See Microscope.
Compound motion. See Motion.
Compound number (Math.), one constructed according to a
varying scale of denomination; as, 3 cwt., 1 qr., 5 lb.;
-- called also denominate number.
Compound pier (Arch.), a clustered column.
Compound quantity (Alg.), a quantity composed of two or
more simple quantities or terms, connected by the sign +
(plus) or - (minus). Thus, a + b - c, and bb - b, are
compound quantities.
Compound radical. (Chem.) See Radical.
Compound ratio (Math.), the product of two or more ratios;
thus ab:cd is a ratio compounded of the simple ratios a:c
and b:d.
Compound rest (Mech.), the tool carriage of an engine
lathe.
Compound screw (Mech.), a screw having on the same axis two
or more screws with different pitch (a differential
screw), or running in different directions (a right and
left screw).
Compound time (Mus.), that in which two or more simple
measures are combined in one; as, 6-8 time is the joining
of two measures of 3-8 time.
Compound word, a word composed of two or more words;
specifically, two or more words joined together by a
hyphen.
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Motion \Mo"tion\, n. [F., fr. L. motio, fr. movere, motum, to
move. See Move.]
1. The act, process, or state of changing place or position;
movement; the passing of a body from one place or position
to another, whether voluntary or involuntary; -- opposed
to rest.
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Speaking or mute, all comeliness and grace
attends thee, and each word, each motion, forms.
--Milton.
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2. Power of, or capacity for, motion.
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Devoid of sense and motion. --Milton.
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3. Direction of movement; course; tendency; as, the motion of
the planets is from west to east.
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In our proper motion we ascend. --Milton.
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4. Change in the relative position of the parts of anything;
action of a machine with respect to the relative movement
of its parts.
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This is the great wheel to which the clock owes its
motion. --Dr. H. More.
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5. Movement of the mind, desires, or passions; mental act, or
impulse to any action; internal activity.
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Let a good man obey every good motion rising in his
heart, knowing that every such motion proceeds from
God. --South.
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6. A proposal or suggestion looking to action or progress;
esp., a formal proposal made in a deliberative assembly;
as, a motion to adjourn.
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Yes, I agree, and thank you for your motion. --Shak.
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7. (Law) An application made to a court or judge orally in
open court. Its object is to obtain an order or rule
directing some act to be done in favor of the applicant.
--Mozley & W.
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8. (Mus.) Change of pitch in successive sounds, whether in
the same part or in groups of parts.
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The independent motions of different parts sounding
together constitute counterpoint. --Grove.
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Note: Conjunct motion is that by single degrees of the scale.
Contrary motion is that when parts move in opposite
directions. Disjunct motion is motion by skips. Oblique
motion is that when one part is stationary while
another moves. Similar or direct motion is that when
parts move in the same direction.
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9. A puppet show or puppet. [Obs.]
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What motion's this? the model of Nineveh? --Beau. &
Fl.
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Note: Motion, in mechanics, may be simple or compound.
Simple motions are: (a) straight translation, which, if
of indefinite duration, must be reciprocating. (b)
Simple rotation, which may be either continuous or
reciprocating, and when reciprocating is called
oscillating. (c) Helical, which, if of indefinite
duration, must be reciprocating.
Compound motion consists of combinations of any of the
simple motions.
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Center of motion, Harmonic motion, etc. See under
Center, Harmonic, etc.
Motion block (Steam Engine), a crosshead.
Perpetual motion (Mech.), an incessant motion conceived to
be attainable by a machine supplying its own motive forces
independently of any action from without. According to the
law of conservation of energy, such perpetual motion is
impossible, and no device has yet been built that is
capable of perpetual motion.
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Syn: See Movement.
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