Part 407

Isorropic line (in a diagram) (Geom.), the locus of all the points for which a specified function has a constant value. Newcomb.

I*sos"ce*les (?), a. [L., fr. Gr. &?;; 'i`sos equal + &?; leg.] (Geom.) Having two legs or sides that are equal; -- said of a triangle.

||I`so*spon"dy*li (?), n. pl. [NL., fr. Gr. 'i`sos equal + &?;, &?;, a ||vertebra.] (Zoöl.) An extensive order of fishes, including the ||salmons, herrings, and many allied forms. || I`so*spon"dy*lous (?), a. (Zoöl.) Of or pertaining to the Isospondyli; having the anterior vertebræ separate and normal.

I`so*spor"ic (?), a. [Iso- + Gr. &?; fruit.] (Bot.) Producing but one kind of spore, as the ferns and Equiseta. Cf. Heterosporic.

I`so*stem"o*nous (?), a. [Iso- + Gr. sth`mwn thread.] (Bot.) Having exactly as many stamens as petals.

I`so*stem"o*ny (?), n. (Bot.) The quality or state of being isostemonous.

I`so*sul`pho*cy"a*nate (?), n. (Chem.) A salt of isosulphocyanic acid.

I`so*sul`pho*cy*an"ic (?), a. (Chem.) Pertaining to, or designating, an acid, HNCS, isomeric with sulphocyanic acid.

I*soth"er*al (?), a. Having the nature of an isothere; indicating the distribution of temperature by means of an isothere; as, an isotheral chart or line.

I"so*there (?), n. [Iso- + Gr. &?; summer, &?; to heat.] (Phys. Geog.) A line connecting points on the earth's surface having the same mean summer temperature.

I"so*therm (?), n. [Iso- + Gr. &?; heat, fr. &?; hot.] (Phys. Geog.) A line connecting or marking points on the earth's surface having the same temperature. This may be the temperature for a given time of observation, or the mean temperature for a year or other period. Also, a similar line based on the distribution of temperature in the ocean.

I`so*ther"mal (?), a. [Cf. F. isotherme.] (a) Relating to equality of temperature. (b) (Phys. Geog.) Having reference to the geographical distribution of temperature, as exhibited by means of isotherms; as, an isothermal line; an isothermal chart.

Isothermal line. (a) An isotherm. (b) A line drawn on a diagram of energy such that its ordinates represent the pressures of a substance corresponding to various volumes, while the absolute temperature is maintained at a constant value. -- Isothermal zones, spaces on opposite sides of the equator having the same mean temperature, and bounded by corresponding isothermal lines.

I`so*ther"mo*bath (?), n. [Iso- + Gr. &?; hot + &?; depth.] (Phys. Geog) A line drawn through points of equal temperature in a vertical section of the ocean.

I`so*ther`mo*bath"ic (?), a. Of or pertaining to an isothermobath; possessing or indicating equal temperatures in a vertical section, as of the ocean.

I*soth`er*om"brose (?), n. [Iso- + Gr. qe`ros summer + 'o`mbros rain.] (Phys. Geog) A line connecting or marking points on the earth's surface, which have the same mean summer rainfall.

I`so*ton"ic (?), a. [Iso- + tonic.] Having or indicating, equal tones, or tension.

Isotonic system (Mus.), a system consisting of intervals, in which each concord is alike tempered, and in which there are twelve equal semitones.

I`so*tri*mor"phic (?), a. Isotrimorphous.

I`so*tri*mor"phism (?), n. [Iso- + Gr. &?; thrice + &?; form.] Isomorphism between the three forms, severally, of two trimorphous substances.

I`so*tri*mor"phous (?), a. Having the quality of isotrimorphism; isotrimorphic.

I`so*trop"ic (?), a. [Iso- + Gr. &?; a turning, fr. &?; to turn.] (Physics) Having the same properties in all directions; specifically, equally elastic in all directions.

I*sot"ro*pism (?), n. Isotropy.

I*sot"ro*pous (?), a. Isotropic.

I*sot"ro*py (?), n. (Physics) Uniformity of physical properties in all directions in a body; absence of all kinds of polarity; specifically, equal elasticity in all directions.

I`so*u"ric (?), a. [Iso- + uric.] (Chem.) Pertaining to, or designating, a complex nitrogenous acid, isomeric with uric acid.

Is"ra*el*ite (?), n. [L. Israëlites, Gr. &?;, fr. &?;, &?;, Israel, Heb. Yisr&?;l, i. e., champion of God; srh to fight + &?;l God.] A descendant of Israel, or Jacob; a Hebrew; a Jew.

{ Is`ra*el*it"ic (?), Is"ra*el*i`tish (?), } a. Of or pertaining to Israel, or to the Israelites; Jewish; Hebrew.