资料来源 : Webster's Revised Unabridged Dictionary (1913)

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}.

            Speaking or mute, all comeliness and grace attends
            thee, and each word, each motion, forms. --Milton.

   2. Power of, or capacity for, motion.

            Devoid of sense and motion.           --Milton.

   3. Direction of movement; course; tendency; as, the motion of
      the planets is from west to east.

            In our proper motion we ascend.       --Milton.

   4. Change in the relative position of the parts of anything;
      action of a machine with respect to the relative movement
      of its parts.

            This is the great wheel to which the clock owes its
            motion.                               --Dr. H. More.

   5. Movement of the mind, desires, or passions; mental act, or
      impulse to any action; internal activity.

            Let a good man obey every good motion rising in his
            heart, knowing that every such motion proceeds from
            God.                                  --South.

   6. A proposal or suggestion looking to action or progress;
      esp., a formal proposal made in a deliberative assembly;
      as, a motion to adjourn.

            Yes, I agree, and thank you for your motion. --Shak.

   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.

   8. (Mus.) Change of pitch in successive sounds, whether in
      the same part or in groups of parts.

            The independent motions of different parts sounding
            together constitute counterpoint.     --Grove.

   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.

   9. A puppet show or puppet. [Obs.]

            What motion's this? the model of Nineveh? --Beau. &
                                                  Fl.

   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.

   {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.

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.

         Compound substances are made up of two or more simple
         substances.                              --I. Watts.

   {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.