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1. H2O;a clear, odorless, tasteless liquid, solidifying at 32°F (0°C and R), and boiling at 212°F (100°C, 80°R), that is present in all animal and vegetable tissues and dissolves more substances than any other liquid. See volume. 2. Euphemism for urine. 3. A pharmacopeial preparation of a clear saturated aqueous solution (unless otherwise specified) of volatile oils, or other aromatic or volatile substances, prepared by processes involving distillation or solution (agitation followed by filtration).aromatic w; [A.S. waeter]
w. of adhesion w. held by molecular attraction in contact with solid surfaces, but not forming an essential part of their constitution.
alkaline w. a w. that contains appreciable amounts of the bicarbonates of calcium, lithium, potassium, or sodium.
aromatic w. water (3)
baryta w. a saturated aqueous solution of barium hydroxide; used as an alkaline reagent.
bitter w. a natural mineral w. containing Epsom salt.
black w. azoturia of horses
bound w. w. held to colloids and other substances and not removed by simple filtration.
bromine w. a w. containing the bromides of magnesium, potassium, or sodium in therapeutic amounts.
calcic w. a w. containing appreciable quantities of calcium salts in solution.
carbonated w. , carbonic w. w. that contains a considerable amount of carbonic acid in solution.
carbon dioxide-free w. purified w. that has been boiled vigorously for 5 minutes or more.
chalybeate w. a w. that contains salts of iron in appreciable quantities.
chlorine w. a w. that contains the chlorides of sodium, potassium, calcium, and magnesium in varying amounts.
w. of combustion w. of metabolism
w. of constitution w. held by a unit of structure as an essential part of its constitution, though not an ingredient of its molecules. See w. of crystallization.
w. of crystallization w. of constitution that unites with certain salts and is essential to their arrangement in crystalline form; e.g., CuSO4. 5H2O.
deionized w. w. purified by passing through ion-exchange columns.
distilled w. w. purified by distillation.
earthy w. a w. containing a large amount of mineral matter, chiefly sulfate, in solution.
free w. w. in the body that can be removed by ultrafiltration and in which substances can be dissolved.
gentian aniline w. gentian violet with saturated aniline w., a more effective stain than simple gentian violet.
hard w. w. containing ions, such as Mg2+ and Ca2+, that form insoluble salts with fatty acids so that ordinary soap will not lather in it.
heavy w. D2O;w. in which the hydrogen atoms are deuterium, or heavy hydrogen (2H), with physical properties that differ noticeably from those of ordinary w.; an elevated presence will cause a decrease in metabolic activity; used as a moderator in nuclear reactors because of its capacity to absorb neutrons.deuterium oxide;
indifferent w. a mineral w. containing only a small quantity of saline matter.
w. for injection w. purified by distillation for the preparation of products for parenteral use.
lime w. calcium hydroxide solution; a saturated solution prepared by mixing 3 g of calcium hydroxide in a liter of purified cool w. Undissolved calcium hydroxide is allowed to precipitate and the solution is dispensed without agitation; lime w. is a common ingredient in lotions and is used internally extensively in veterinary medicine.
w. of metabolism the w. formed in the body by oxidation of the hydrogen of the food, the greatest amount being produced in the metabolism of fat (about 117 g/100 g of fat).w. of combustion;
mineral w. w. that contains appreciable amounts of certain salts, which give it therapeutic properties.
potable w. a w. fit for drinking, being free from contamination and not containing a sufficient quantity of saline material to be regarded as a mineral w.
purified w. w. obtained by distillation or deionization.
saline w. a w. that contains neutral salts (chlorides, bromides, iodides, sulfates) in appreciable amounts.
Selters w. , Seltzer w. a mineral w. containing carbonates of sodium, calcium, and magnesium, and chloride of sodium. [Nieder Selters, a mineral spring in Prussia]
soft w. w. lacking those ions, such as Mg2+ and Ca2+, that form insoluble salts with fatty acids, so that ordinary soap will lather easily in it.
sulfate w. a w. holding in solution appreciable quantities of the sulfates of calcium, magnesium, or sodium.
sulfur w. a w. containing hydrogen sulfide or the metallic sulfides.
total body w. (TBW) the sum of intracellular w. and extracellular w. (volume). About 60% of body weight.
transcellular w. that fraction of extracellular w. in cerebrospinal, digestive, epithelial, introcular, pleural, sweat, and synovial secretions; about 1.5% of body weight.
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