The Collaborative International Dictionary of English v.0.48:
lactose \lac"tose`\ (l[a^]k"t[=o]s`), n.
1. (Physiol. Chem.) The main sugar present in milk, called
also sugar of milk or milk sugar. When isolated pure
it is obtained crystalline; it is separable from the whey
by evaporation and crystallization. It is a disaccharide
with the formula C12H22O11, being chemically
4-([beta]-D-galactosido)-D-glucose. It has a slightly
sweet taste, is dextrorotary, and is much less soluble in
water than either cane sugar or glucose. Formerly called
lactin. When hydrolyzed it yields glucose and galactose.
In cells it may be hydrolyzed by the enzyme
[beta]-galactosidase.
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2. (Chem.) See Galactose.
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The Collaborative International Dictionary of English v.0.48:
Milk \Milk\ (m[i^]lk), n. [AS. meoluc, meoloc, meolc, milc; akin
to OFries. meloc, D. melk, G. milch, OHG. miluh, Icel.
mj[=o]lk, Sw. mj["o]lk, Dan. melk, Goth. miluks, G. melken to
milk, OHG. melchan, Lith. milszti, L. mulgere, Gr.
'ame`lgein. [root]107. Cf. Milch, Emulsion, Milt soft
roe of fishes.]
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1. (Physiol.) A white fluid secreted by the mammary glands of
female mammals for the nourishment of their young,
consisting of minute globules of fat suspended in a
solution of casein, albumin, milk sugar, and inorganic
salts. "White as morne milk." --Chaucer.
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2. (Bot.) A kind of juice or sap, usually white in color,
found in certain plants; latex. See Latex.
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3. An emulsion made by bruising seeds; as, the milk of
almonds, produced by pounding almonds with sugar and
water.
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4. (Zool.) The ripe, undischarged spat of an oyster.
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Condensed milk. See under Condense, v. t.
Milk crust (Med.), vesicular eczema occurring on the face
and scalp of nursing infants. See Eczema.
Milk fever.
(a) (Med.) A fever which accompanies or precedes the first
lactation. It is usually transitory.
(b) (Vet. Surg.) A form puerperal peritonitis in cattle;
also, a variety of meningitis occurring in cows after
calving.
Milk glass, glass having a milky appearance.
Milk knot (Med.), a hard lump forming in the breast of a
nursing woman, due to obstruction to the flow of milk and
congestion of the mammary glands.
Milk leg (Med.), a swollen condition of the leg, usually in
puerperal women, caused by an inflammation of veins, and
characterized by a white appearance occasioned by an
accumulation of serum and sometimes of pus in the cellular
tissue.
Milk meats, food made from milk, as butter and cheese.
[Obs.] --Bailey.
Milk mirror. Same as Escutcheon, 2.
Milk molar (Anat.), one of the deciduous molar teeth which
are shed and replaced by the premolars.
Milk of lime (Chem.), a watery emulsion of calcium hydrate,
produced by macerating quicklime in water.
Milk parsley (Bot.), an umbelliferous plant (Peucedanum
palustre) of Europe and Asia, having a milky juice.
Milk pea (Bot.), a genus (Galactia) of leguminous and,
usually, twining plants.
Milk sickness (Med.), See milk sickness in the
vocabulary.
Milk snake (Zool.), a harmless American snake (Ophibolus
triangulus, or Ophibolus eximius). It is variously
marked with white, gray, and red. Called also milk
adder, chicken snake, house snake, etc.
Milk sugar. (Physiol. Chem.) See Lactose, and Sugar of
milk (below).
Milk thistle (Bot.), an esculent European thistle (Silybum
marianum), having the veins of its leaves of a milky
whiteness.
Milk thrush. (Med.) See Thrush.
Milk tooth (Anat.), one of the temporary first set of teeth
in young mammals; in man there are twenty.
Milk tree (Bot.), a tree yielding a milky juice, as the cow
tree of South America (Brosimum Galactodendron), and the
Euphorbia balsamifera of the Canaries, the milk of both
of which is wholesome food.
Milk vessel (Bot.), a special cell in the inner bark of a
plant, or a series of cells, in which the milky juice is
contained. See Latex.
Rock milk. See Agaric mineral, under Agaric.
Sugar of milk. The sugar characteristic of milk; a hard
white crystalline slightly sweet substance obtained by
evaporation of the whey of milk. It is used in pellets and
powder as a vehicle for homeopathic medicines, and as an
article of diet. See Lactose.
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The Collaborative International Dictionary of English v.0.48:
Sugar \Sug"ar\, n. [OE. sugre, F. sucre (cf. It. zucchero, Sp.
az['u]car), fr. Ar. sukkar, assukkar, fr. Skr. [,c]arkar[=a]
sugar, gravel; cf. Per. shakar. Cf. Saccharine, Sucrose.]
1. A sweet white (or brownish yellow) crystalline substance,
of a sandy or granular consistency, obtained by
crystallizing the evaporated juice of certain plants, as
the sugar cane, sorghum, beet root, sugar maple, etc. It
is used for seasoning and preserving many kinds of food
and drink. Ordinary sugar is essentially sucrose. See the
Note below.
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Note: The term sugar includes several commercial grades, as
the white or refined, granulated, loaf or lump, and the
raw brown or muscovado. In a more general sense, it
includes several distinct chemical compounds, as the
glucoses, or grape sugars (including glucose proper,
dextrose, and levulose), and the sucroses, or true
sugars (as cane sugar). All sugars are carbohydrates.
See Carbohydrate. The glucoses, or grape sugars, are
ketone alcohols of the formula C6H12O6, and they turn
the plane of polarization to the right or the left.
They are produced from the amyloses and sucroses, as by
the action of heat and acids of ferments, and are
themselves decomposed by fermentation into alcohol and
carbon dioxide. The only sugar (called acrose) as yet
produced artificially belongs to this class. The
sucroses, or cane sugars, are doubled glucose
anhydrides of the formula C12H22O11. They are usually
not fermentable as such (cf. Sucrose), and they act
on polarized light.
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2. By extension, anything resembling sugar in taste or
appearance; as, sugar of lead (lead acetate), a poisonous
white crystalline substance having a sweet taste.
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3. Compliment or flattery used to disguise or render
acceptable something obnoxious; honeyed or soothing words.
[Colloq.]
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Acorn sugar. See Quercite.
Cane sugar, sugar made from the sugar cane; sucrose, or an
isomeric sugar. See Sucrose.
Diabetes sugar, or Diabetic sugar (Med. Chem.), a variety
of sugar (grape sugar or dextrose) excreted in the urine
in diabetes mellitus; -- the presence of such a sugar in
the urine is used to diagnose the illness.
Fruit sugar. See under Fruit, and Fructose.
Grape sugar, a sirupy or white crystalline sugar (dextrose
or glucose) found as a characteristic ingredient of ripe
grapes, and also produced from many other sources. See
Dextrose, and Glucose.
Invert sugar. See under Invert.
Malt sugar, a variety of sugar isomeric with sucrose, found
in malt. See Maltose.
Manna sugar, a substance found in manna, resembling, but
distinct from, the sugars. See Mannite.
Milk sugar, a variety of sugar characteristic of fresh
milk, and isomeric with sucrose. See Lactose.
Muscle sugar, a sweet white crystalline substance isomeric
with, and formerly regarded to, the glucoses. It is found
in the tissue of muscle, the heart, liver, etc. Called
also heart sugar. See Inosite.
Pine sugar. See Pinite.
Starch sugar (Com. Chem.), a variety of dextrose made by
the action of heat and acids on starch from corn,
potatoes, etc.; -- called also potato sugar, corn
sugar, and, inaccurately, invert sugar. See Dextrose,
and Glucose.
Sugar barek, one who refines sugar.
Sugar beet (Bot.), a variety of beet (Beta vulgaris) with
very large white roots, extensively grown, esp. in Europe,
for the sugar obtained from them.
Sugar berry (Bot.), the hackberry.
Sugar bird (Zool.), any one of several species of small
South American singing birds of the genera Coereba,
Dacnis, and allied genera belonging to the family
Coerebidae. They are allied to the honey eaters.
Sugar bush. See Sugar orchard.
Sugar camp, a place in or near a sugar orchard, where maple
sugar is made.
Sugar candian, sugar candy. [Obs.]
Sugar candy, sugar clarified and concreted or crystallized;
candy made from sugar.
Sugar cane (Bot.), a tall perennial grass (Saccharum
officinarium), with thick short-jointed stems. It has
been cultivated for ages as the principal source of sugar.
Sugar loaf.
(a) A loaf or mass of refined sugar, usually in the form
of a truncated cone.
(b) A hat shaped like a sugar loaf.
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Why, do not or know you, grannam, and that sugar
loaf? --J. Webster.
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Sugar maple (Bot.), the rock maple (Acer saccharinum).
See Maple.
Sugar mill, a machine for pressing out the juice of the
sugar cane, usually consisting of three or more rollers,
between which the cane is passed.
Sugar mite. (Zool.)
(a) A small mite (Tyroglyphus sacchari), often found in
great numbers in unrefined sugar.
(b) The lepisma.
Sugar of lead. See Sugar, 2, above.
Sugar of milk. See under Milk.
Sugar orchard, a collection of maple trees selected and
preserved for purpose of obtaining sugar from them; --
called also, sometimes, sugar bush. [U.S.] --Bartlett.
Sugar pine (Bot.), an immense coniferous tree (Pinus
Lambertiana) of California and Oregon, furnishing a soft
and easily worked timber. The resinous exudation from the
stumps, etc., has a sweetish taste, and has been used as a
substitute for sugar.
Sugar squirrel (Zool.), an Australian flying phalanger
(Belideus sciureus), having a long bushy tail and a
large parachute. It resembles a flying squirrel. See
Illust. under Phlanger.
Sugar tongs, small tongs, as of silver, used at table for
taking lumps of sugar from a sugar bowl.
Sugar tree. (Bot.) See Sugar maple, above.
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