Found 2 items, similar to Double salt.
English → English
Definition: double salt
n : a solution of two simple salts that forms a single substance
English → English
Definition: Double salt
, n. [AS. sealt; akin to OS. & OFries. salt, D. zout,
G. salz, Icel., Sw., & Dan. salt, L. sal, Gr. ?, Russ. sole,
Ir. & Gael. salann, W. halen, of unknown origin. Cf. Sal
1. The chloride of sodium, a substance used for seasoning
food, for the preservation of meat, etc. It is found
native in the earth, and is also produced, by evaporation
and crystallization, from sea water and other water
impregnated with saline particles.
2. Hence, flavor; taste; savor; smack; seasoning.
Though we are justices and doctors and churchmen . .
. we have some salt of our youth in us. --Shak.
3. Hence, also, piquancy; wit; sense; as, Attic salt.
4. A dish for salt at table; a saltcellar.
I out and bought some things; among others, a dozen
of silver salts. --Pepys.
5. A sailor; -- usually qualified by old. [Colloq.]
Around the door are generally to be seen, laughing
and gossiping, clusters of old salts. --Hawthorne.
6. (Chem.) The neutral compound formed by the union of an
acid and a base; thus, sulphuric acid and iron form the
salt sulphate of iron or green vitriol.
Note: Except in case of ammonium salts, accurately speaking,
it is the acid radical which unites with the base or
basic radical, with the elimination of hydrogen, of
water, or of analogous compounds as side products. In
the case of diacid and triacid bases, and of dibasic
and tribasic acids, the mutual neutralization may vary
in degree, producing respectively basic, neutral, or
acid salts. See Phrases below.
7. Fig.: That which preserves from corruption or error; that
which purifies; a corrective; an antiseptic; also, an
allowance or deduction; as, his statements must be taken
with a grain of salt.
Ye are the salt of the earth. --Matt. v. 13.
8. pl. Any mineral salt used as an aperient or cathartic,
especially Epsom salts, Rochelle salt, or Glauber's salt.
9. pl. Marshes flooded by the tide. [Prov. Eng.]
Above the salt
, Below the salt
, phrases which have
survived the old custom, in the houses of people of rank,
of placing a large saltcellar near the middle of a long
table, the places above which were assigned to the guests
of distinction, and those below to dependents, inferiors,
and poor relations. See Saltfoot
His fashion is not to take knowledge of him that is
beneath him in clothes. He never drinks below the
salt. --B. Jonson.
(a) A salt derived from an acid which has several
replaceable hydrogen atoms which are only partially
exchanged for metallic atoms or basic radicals; as,
acid potassium sulphate is an acid salt.
(b) A salt, whatever its constitution, which merely gives
an acid reaction; thus, copper sulphate, which is
composed of a strong acid united with a weak base, is
an acid salt in this sense, though theoretically it is
a neutral salt.
(Chem.), a salt which gives an alkaline
reaction, as sodium carbonate.
(Old Chem.), a salt of the oxy type, formerly
regarded as composed of two oxides, an acid and a basic
(a) A salt which contains more of the basic constituent
than is required to neutralize the acid.
(b) An alkaline salt.
(Chem.), a salt of the oxy type conveniently
regarded as composed of two ingredients (analogously to a
haloid salt), viz., a metal and an acid radical.
(Chem.), a salt regarded as formed by the union
of two distinct salts, as common alum, potassium aluminium
sulphate. See under Double
. See in the Vocabulary.
(Old Chem.), a salt obtained by
crystallizing plant juices.
. (Chem.) See under Ethereal
or Glauber's salts
. See in Vocabulary.
(Chem.), a simple salt of a halogen acid, as
. (Chem.). See under Microcosmic
(a) A salt in which the acid and base (in theory)
neutralize each other.
(b) A salt which gives a neutral reaction.
(Chem.), a salt derived from an oxygen acid.
(Old Chem.), a salt supposed to be derived from a
peroxide base or analogous compound. [Obs.]
, a salt which undergoes no change on
exposure to the air.
(Chem.), a salt derived from a protoxide base or
. See under Rochelle
Salt of amber
(Old Chem.), succinic acid.
Salt of colcothar
(Old Chem.), green vitriol, or sulphate
Salt of hartshorn
. (Old Chem.)
(a) Sal ammoniac, or ammonium chloride.
(b) Ammonium carbonate. Cf. Spirit of hartshorn
Salt of lemons
. (Chem.) See Salt of sorrel
Salt of Saturn
(Old Chem.), sugar of lead; lead acetate; --
the alchemical name of lead being Saturn.
Salt of Seignette
. Same as Rochelle salt
Salt of soda
(Old Chem.), sodium carbonate.
Salt of sorrel
(Old Chem.), acid potassium oxalate, or
potassium quadroxalate, used as a solvent for ink stains;
-- so called because found in the sorrel, or Oxalis. Also
sometimes inaccurately called salt of lemon
Salt of tartar
(Old Chem.), potassium carbonate; -- so
called because formerly made by heating cream of tartar,
or potassium tartrate. [Obs.]
Salt of Venus
(Old Chem.), blue vitriol; copper sulphate;
-- the alchemical name of copper being Venus.
Salt of wisdom
. See Alembroth
(Old Med. Chem.), boric acid.
(Chem.), a salt derived from a sesquioxide base
or analogous compound.
Spirit of salt
. (Chem.) See under Spirit
(Chem.), a salt analogous to an oxy salt, but
containing sulphur in place of oxygen.
(d[u^]b"'l), a. [OE. doble, duble, double, OF.
doble, duble, double, F. double, fr. L. duplus, fr. the root
of duo two, and perh. that of plenus full; akin to Gr.
diplo`os double. See Two
, and Full
, and cf. Diploma
1. Twofold; multiplied by two; increased by its equivalent;
made twice as large or as much, etc.
Let a double portion of thy spirit be upon me. -- 2
Kings ii. 9.
Darkness and tempest make a double night. --Dryden.
2. Being in pairs; presenting two of a kind, or two in a set
[Let] The swan, on still St. Mary's lake,
Float double, swan and shadow. --Wordsworth.
3. Divided into two; acting two parts, one openly and the
other secretly; equivocal; deceitful; insincere.
With a double heart do they speak. -- Ps. xii. 2.
4. (Bot.) Having the petals in a flower considerably
increased beyond the natural number, usually as the result
of cultivation and the expense of the stamens, or stamens
and pistils. The white water lily and some other plants
have their blossoms naturally double.
Note: Double is often used as the first part of a compound
word, generally denoting two ways, or twice the number,
quantity, force, etc., twofold, or having two.
, or Double bass
(Mus.), the largest and
lowest-toned instrument in the violin form; the
contrabasso or violone.
. See under Convex
(Mus.), that species of counterpoint or
composition, in which two of the parts may be inverted, by
setting one of them an octave higher or lower.
(Lawn Tennis), a court laid out for four
players, two on each side.
(Print.), a reference mark ([dag]) next to
the dagger ([dagger]) in order; a diesis.
(Mus.), a large drum that is beaten at both
, a gold coin of the United States having the
value of 20 dollars.
. See under Bookkeeping
(Arch.), a floor in which binding joists
support flooring joists above and ceiling joists below.
See Illust. of Double-framed floor.
. See Double
, a., 4.
(Arch.), a double floor having girders
into which the binding joists are framed.
(Mus.), a fugue on two subjects.
(a) (Print.) Two letters on one shank; a ligature.
(b) A mail requiring double postage.
(Mus.), a note of double the length of the
semibreve; a breve. See Breve
(Mus.), an interval composed of two octaves,
or fifteen notes, in diatonic progression; a fifteenth.
. See under Pica
(Baseball), a play by which two players are put
out at the same time.
(Law), a plea alleging several matters in
answer to the declaration, where either of such matters
alone would be a sufficient bar to the action. --Stephen.
(Geom.), a point of a curve at which two
branches cross each other. Conjugate or isolated points of
a curve are called double points, since they possess most
of the properties of double points (see Conjugate
are also called acnodes
, and those points where the
branches of the curve really cross are called crunodes
The extremity of a cusp is also a double point.
. (Eccl. Law) See Duplex querela
. (Opt.) See Refraction
(a) A mixed salt of any polybasic acid which has been
saturated by different bases or basic radicals, as the
double carbonate of sodium and potassium,
(b) A molecular combination of two distinct salts, as
common alum, which consists of the sulphate of
aluminium, and the sulphate of potassium or ammonium.
, a low, noisy dance.
(Polit. Econ.), a double standard of
monetary values; i. e., a gold standard and a silver
standard, both of which are made legal tender.
(Astron.), two stars so near to each other as
to be seen separate only by means of a telescope. Such
stars may be only optically near to each other, or may be
physically connected so that they revolve round their
common center of gravity, and in the latter case are
called also binary stars.
(Mil.). Same as Double-quick
, a window having two sets of glazed sashes
with an air space between them.