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

Sandstone \Sand"stone`\, n.
   A rock made of sand more or less firmly united. Common or
   siliceous sandstone consists mainly of quartz sand.

   Note: Different names are applied to the various kinds of
         sandstone according to their composition; as, granitic,
         argillaceous, micaceous, etc.

   {Flexible sandstone} (Min.), the finer-grained variety of
      itacolumite, which on account of the scales of mica in the
      lamination is quite flexible.

   {Red sandstone}, a name given to two extensive series of
      British rocks in which red sandstones predominate, one
      below, and the other above, the coal measures. These were
      formerly known as the Old and the New Red Sandstone
      respectively, and the former name is still retained for
      the group preceding the Coal and referred to the Devonian
      age, but the term New Red Sandstone is now little used,
      some of the strata being regarded as Permian and the
      remained as Triassic. See the Chart of {Geology}.



   {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.