Webster's Unabridged Dictionary - Letter I - Page 76

Ismaelite (n.) One of a sect of Mohammedans who favored the pretensions of the family of Mohammed ben Ismael, of the house Ali.

Iso- () Alt. of Is-

Is- () A prefix or combining form, indicating identity, or equality; the same numerical value; as in isopod, isomorphous, isochromatic.

Is- () Applied to certain compounds having the same composition but different properties; as in isocyanic.

Is- () Applied to compounds of certain isomeric series in whose structure one carbon atom, at least, is connected with three other carbon atoms; -- contrasted with neo- and normal; as in isoparaffine; isopentane.

Isobar (n.) A line connecting or marking places upon the surface of the earth where height of the barometer reduced to sea level is the same either at a given time, or for a certain period (mean height), as for a year; an isopiestic line.

Isobaric (a.) Denoting equal pressure; as, an isobaric line; specifically, of or pertaining to isobars.

Isobar (n.) The quality or state of being equal in weight, especially in atmospheric pressure. Also, the theory, method, or application of isobaric science.

Isobarometric (a.) Indicating equal barometric pressure.

Isobathytherm (n.) A line connecting the points on the surface of the earth where a certain temperature is found at the same depth.

Isobathythermic (a.) Of or pertaining to an isobathytherm; possessing or indicating the same temperature at the same depth.

Isocephalism (n.) A peculiarity in the design of bas-relief by which the heads of human figures are kept at the same height from the ground, whether the personages are seated, standing, or mounted on horseback; -- called also isokephaleia.

Isochasm (n.) A line connecting places on the earth's surface at which there is the same mean frequency of auroras.

Isochasmic (a.) Indicating equal auroral display; as, an isochasmic line.

Isocheim (n.) A line connecting places on the earth having the same mean winter temperature. Cf. Isothere.

Isocheimal (a.) Alt. of Isochimal

Isochimal (a.) Pertaining to, having the nature of, or making, isocheims; as, an isocheimal line; an isocheimal chart.

Isocheimenal (a.) Alt. of Isochimenal

Isochimenal (a.) The same as Isocheimal.

Isocheimic (a.) The same as Isocheimal.

Isochimene (n.) The same as Isocheim.

Isochromatic (a.) Having the same color; connecting parts having the same color, as lines drawn through certain points in experiments on the chromatic effects of polarized light in crystals.

Isochronal (a.) Uniform in time; of equal time; performed in equal times; recurring at regular intervals; isochronal vibrations or oscillations.

Isochronic (a.) Isochronal.

Isochronism (n.) The state or quality of being isochronous.

Isochronon (n.) A clock that is designed to keep very accurate time.

Isochronous (a.) Same as Isochronal.

Isochroous (a.) Having the same tint or color throughout; uniformly or evenly colored.

Isoclinal (a.) Alt. of Isoclinic

Isoclinic (a.) Of or pertaining to, or indicating, equality of inclination or dip; having equal inclination or dip.

Isocrymal (a.) Pertaining to, having the nature of, or illustrating, an isocryme; as, an isocrymal line; an isocrymal chart.

Isocryme (n.) A line connecting points on the earth's surface having the same mean temperature in the coldest month of the year.

Isocrymic (a.) Isocrymal.

Isocyanic (a.) Designating an acid isomeric with cyanic acid.

Isocyanuric (a.) Designating, or pertaining to, an acid isomeric with cyanuric acid, and called also fulminuric acid. See under Fulminuric.

Isodiabatic (a.) Pertaining to the reception or the giving out of equal quantities of heat by a substance.

Isodiametric (a.) Developed alike in the directions of the several lateral axes; -- said of crystals of both the tetragonal and hexagonal systems.

Isodiametric (a.) Having the several diameters nearly equal; -- said of the cells of ordinary parenchyma.

Isodimorphic (a.) Isodimorphous.

Isodimorphism (n.) Isomorphism between the two forms severally of two dimorphous substances.

Isodimorphous (a.) Having the quality of isodimorphism.

Isodulcite (n.) A white, crystalline, sugarlike substance, obtained by the decomposition of certain glucosides, and intermediate in nature between the hexacid alcohols (ductile, mannite, etc.) and the glucoses.

Isodynamic (a.) Of, pertaining to, having, or denoting, equality of force.

Isodynamous (a.) Of equal force or size.

Isogeotherm (n.) A line or curved surface passing beneath the earth's surface through points having the same mean temperature.

Isogeothermal (a.) Alt. of Isogeothermic

Isogeothermic (a.) Pertaining to, having the nature of, or marking, isogeotherms; as, an isogeothermal line or surface; as isogeothermal chart.

Isogeothermic (n.) An isogeotherm.

Isogonic (a.) Pertaining to, or noting, equal angles.

Isogonic (a.) Characterized by isogonism.

Isogonism (n.) The quality of having similar sexual zooids or gonophores and dissimilar hydrants; -- said of certain hydroids.

Isographic (a.) Of or pertaining to isography.

Isography (n.) Imitation of another's handwriting.

Isohyetose (a.) Of or pertaining to lines connecting places on the earth's surface which have a mean annual rainfall.

Isohyetose (n.) An isohyetose line.

Isolable (a.) Capable of being isolated, or of being obtained in a pure state; as, gold is isolable.

Isolated (imp. & p. p.) of Isolate

Isolating (p. pr. & vb. n.) of Isolate

Isolate (v. t.) To place in a detached situation; to place by itself or alone; to insulate; to separate from others.

Isolate (v. t.) To insulate. See Insulate.

Isolate (v. t.) To separate from all foreign substances; to make pure; to obtain in a free state.

Isolated (a.) Placed or standing alone; detached; separated from others.

Isolatedly (adv.) In an isolated manner.

Isolation (n.) The act of isolating, or the state of being isolated; insulation; separation; loneliness.

Isolator (n.) One who, or that which, isolates.

Isologous (a.) Having similar proportions, similar relations, or similar differences of composition; -- said specifically of groups or series which differ by a constant difference; as, ethane, ethylene, and acetylene, or their analogous compounds, form an isologous series.

Isomer (n.) A body or compound which is isomeric with another body or compound; a member of an isomeric series.

Isomeric (a.) Having the same percentage composition; -- said of two or more different substances which contain the same ingredients in the same proportions by weight, often used with with. Specif.: (a) Polymeric; i. e., having the same elements united in the same proportion by weight, but with different molecular weights; as, acetylene and benzine are isomeric (polymeric) with each other in this sense. See Polymeric. (b) Metameric; i. e., having the same elements united in the same proportions by weight, and with the same molecular weight, but which a different structure or arrangement of the ultimate parts; as, ethyl alcohol and methyl ether are isomeric (metameric) with each other in this sense. See Metameric.

Isomeride (n.) An isomer.

Isomerism (n.) The state, quality, or relation, of two or more isomeric substances.

Isomeromorphism (n.) Isomorphism between substances that are isomeric.

Isometric (a.) Alt. of Isometrical

Isometrical (a.) Pertaining to, or characterized by, equality of measure.

Isometrical (a.) Noting, or conforming to, that system of crystallization in which the three axes are of equal length and at right angles to each other; monometric; regular; cubic. Cf. Crystallization.

Isomorph (n.) A substance which is similar to another in crystalline form and composition.

Isomorphic (a.) Isomorphous.

Isomorphism (n.) A similarity of crystalline form between substances of similar composition, as between the sulphates of barium (BaSO4) and strontium (SrSO4). It is sometimes extended to include similarity of form between substances of unlike composition, which is more properly called homoeomorphism.

Isomorphous (a.) Having the quality of isomorphism.

Isonandra (n.) A genus of sapotaceous trees of India. Isonandra Gutta is the principal source of gutta-percha.

Isonephelic (a.) Having, or indicating, an equal amount of cloudiness for a given period; as, isonephelic regions; an isonephelic line.

Isonicotine (n.) A crystalline, nitrogenous base, C10H14N2, isomeric with nicotine.

Isonicotinic (a.) Pertaining to, or derived from, isonicotine.

Isonicotinic (a.) Pertaining to, or designating, an acid isomeric with nicotinic acid.

Isonitroso- () A combining from (also used adjectively), signifying: Pertaining to, or designating, the characteristic, nitrogenous radical, NOH, called the isonitroso group.

Isonomic (a.) The same, or equal, in law or right; one in kind or origin; analogous; similar.

Isonomy (n.) Equal law or right; equal distribution of rights and privileges; similarity.

Isopathy (n.) The system which undertakes to cure a disease by means of the virus of the same disease.

Isopathy (n.) The theory of curing a diseased organ by eating the analogous organ of a healthy animal.

Isopathy (n.) The doctrine that the power of therapeutics is equal to that of the causes of disease.

Isopepsin (n.) Pepsin modified by exposure to a temperature of from 40¡ to 60¡ C.

Isoperimetrical (a.) Having equal perimeters of circumferences; as, isoperimetrical figures or bodies.

Isoperimetry (n.) The science of figures having equal perimeters or boundaries.

Isopiestic (a.) Having equal pressure.

Isopleura (n. pl.) A subclass of Gastropoda, in which the body is symmetrical, the right and left sides being equal.

Isopod (a.) Having the legs similar in structure; belonging to the Isopoda.

Isopod (n.) One of the Isopoda.

Isopoda (n. pl.) An order of sessile-eyed Crustacea, usually having seven pairs of legs, which are all similar in structure.

Isopodiform (a.) Having the shape of an isopod; -- said of the larvae of certain insects.

Isopodous (a.) Same as Isopod.

Isopogonous (a.) Having the two webs equal in breath; -- said of feathers.

[previous page] [Index] [next page]