資料來源 : Webster's Revised Unabridged Dictionary (1913)

Precipitate \Pre*cip"i*tate\, n. [NL. praecipitatum: cf. F.
   pr['e]cipit['e].]
   1. (Chem.) An insoluble substance separated from a solution
      in a concrete state by the action of some reagent added to
      the solution, or of some force, such as heat or cold. The
      precipitate may fall to the bottom (whence the name), may
      be diffused through the solution, or may float at or near
      the surface.

   {Red precipitate} (Old. Chem), mercuric oxide ({HgO}) a heavy
      red crystalline powder obtained by heating mercuric
      nitrate, or by heating mercury in the air. Prepared in the
      latter manner, it was the {precipitate per se} of the
      alchemists.

   {White precipitate} (Old Chem.)
      (a) A heavy white amorphous powder ({NH2.HgCl}) obtained
          by adding ammonia to a solution of mercuric chloride
          or corrosive sublimate; -- formerly called also
          {infusible white precipitate}, and now {amido-mercuric
          chloride}.
      (b) A white crystalline substance obtained by adding a
          solution of corrosive sublimate to a solution of sal
          ammoniac (ammonium chloride); -- formerly called also
          {fusible white precipitate}.



   {Red horse}. (Zo["o]l.)
   (a) Any large American red fresh-water sucker, especially
       {Moxostoma macrolepidotum} and allied species.
   (b) See the Note under {Drumfish}.

   {Red lead}.
   (Chem) See under {Lead}, and {Minium}.

   {Red-lead ore}. (Min.) Same as {Crocoite}.

   {Red liquor} (Dyeing), a solution consisting essentially of
      aluminium acetate, used as a mordant in the fixation of
      dyestuffs on vegetable fiber; -- so called because used
      originally for red dyestuffs. Called also {red mordant}.
      

   {Red maggot} (Zo["o]l.), the larva of the wheat midge.

   {Red manganese}. (Min.) Same as {Rhodochrosite}.

   {Red man}, one of the American Indians; -- so called from his
      color.

   {Red maple} (Bot.), a species of maple ({Acer rubrum}). See
      {Maple}.

   {Red mite}. (Zo["o]l.) See {Red spider}, below.

   {Red mulberry} (Bot.), an American mulberry of a dark purple
      color ({Morus rubra}).

   {Red mullet} (Zo["o]l.), the surmullet. See {Mullet}.

   {Red ocher} (Min.), a soft earthy variety of hematite, of a
      reddish color.

   {Red perch} (Zo["o]l.), the rosefish.

   {Red phosphorus}. (Chem.) See under {Phosphorus}.

   {Red pine} (Bot.), an American species of pine ({Pinus
      resinosa}); -- so named from its reddish bark.

   {Red precipitate}. See under {Precipitate}.

   {Red Republican} (European Politics), originally, one who
      maintained extreme republican doctrines in France, --
      because a red liberty cap was the badge of the party; an
      extreme radical in social reform. [Cant]

   {Red ribbon}, the ribbon of the Order of the Bath in England.
      

   {Red sanders}. (Bot.) See {Sanders}.

   {Red sandstone}. (Geol.) See under {Sandstone}.

   {Red scale} (Zo["o]l.), a scale insect ({Aspidiotus
      aurantii}) very injurious to the orange tree in California
      and Australia.

   {Red silver} (Min.), an ore of silver, of a ruby-red or
      reddish black color. It includes {proustite}, or light red
      silver, and {pyrargyrite}, or dark red silver.

   {Red snapper} (Zo["o]l.), a large fish ({Lutlanus aya or
      Blackfordii}) abundant in the Gulf of Mexico and about the
      Florida reefs.

   {Red snow}, snow colored by a mocroscopic unicellular alga
      ({Protococcus nivalis}) which produces large patches of
      scarlet on the snows of arctic or mountainous regions.

   {Red softening} (Med.) a form of cerebral softening in which
      the affected parts are red, -- a condition due either to
      infarction or inflammation.

   {Red spider} (Zo["o]l.), a very small web-spinning mite
      ({Tetranychus telarius}) which infests, and often
      destroys, plants of various kinds, especially those
      cultivated in houses and conservatories. It feeds mostly
      on the under side of the leaves, and causes them to turn
      yellow and die. The adult insects are usually pale red.
      Called also {red mite}.

   {Red squirrel} (Zo["o]l.), the chickaree.

   {Red tape}, the tape used in public offices for tying up
      documents, etc.; hence, official formality and delay.