Imperial rule of all the seagirt isles.
Milton.
2. (Zoöl.) A spot within another of a different color, as upon the
wings of some insects.
Isle, v. t. To cause to become an island, or like an island; to
surround or encompass; to island. [Poetic]
Isled in sudden seas of light.
Tennyson.
Is"let (?), n. [OF. islette (cf. F. îlot), dim. of isle.] A little
island.
-ism (?). [F. -isme, or L. -ismus, Gr. &?;.] A suffix indicating an
act, a process, the result of an act or a process, a state; also, a
characteristic (as a theory, doctrine, idiom, etc.); as, baptism,
galvanism, organism, hypnotism, socialism, sensualism, Anglicism.
Ism, n. [See ism, above.] A doctrine or theory; especially, a wild or
visionary theory. E. Everett.
The world grew light-headed, and forth came a spawn of isms which
no man can number.
S. G. Goodrich.
{ Is`ma*e"li*an (?), Is"ma*el*ite (?), } n. (Eccl.) One of a sect of
Mohammedans who favored the pretensions of the family of Mohammed ben
Ismael, of the house of Ali.
{ I"so- (?), Is- (?). } [Gr. 'i`sos equal.] A prefix or combining form,
indicating identity, or equality; the same numerical value; as in
isopod, isomorphous, isochromatic. Specif.: (a) (Chem.) Applied to
certain compounds having the same composition but different properties;
as in isocyanic. (b) (Organic Chem.) 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.
I"so*bar (?), n. [Iso- + Gr. &?; weight.] (Phys. Geog.) 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. [Written also isobare.]
I`so*bar"ic (?), a. (Phys. Geog.) Denoting equal pressure; as, an
isobaric line; specifically, of or pertaining to isobars.
I"so*bar*ism (?), n. The quality or state of being equal in weight,
especially in atmospheric pressure. Also, the theory, method, or
application of isobaric science.
I`so*bar`o*met"ric (?), a. [Iso + barometric.] (Phys. Geog.) Indicating
equal barometric pressure.
I`so*bath"y*therm (?), n. [Iso- + Gr. &?; deep + &?; heat.] (Phys.
Geog.) A line connecting the points on the surface of the earth where a
certain temperature is found at the same depth.
I`so*bath"y*ther"mic (?), a. Of or pertaining to an isobathytherm;
possessing or indicating the same temperature at the same depth.
I`so*ceph"a*lism (?), n. [From Gr. &?; like-headed. See Iso-, and
Cephalon.] (Art) 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.
I"so*chasm (?), n. [Iso- + chasm.] (Phys. Geog.) A line connecting
places on the earth's surface at which there is the same mean frequency
of auroras.
I`so*chas"mic (?), a. Indicating equal auroral display; as, an
isochasmic line.
I"so*cheim ("s*km), n. [Iso- + Gr. &?;, &?;, winter.] (Phys. Geog.) A
line connecting places on the earth having the same mean winter
temperature. Cf. Isothere.
{ I`so*chei"mal, I`so*chi"mal } (?), a. Pertaining to, having the
nature of, or making, isocheims; as, an isocheimal line; an isocheimal
chart.
{ I`so*chei"me*nal (?), I`so*chi"me*nal } a. The same as Isocheimal.
I`so*chei"mic (?), a. The same as Isocheimal.
I`so*chi"mene (?), n. The same as Isocheim.
I`so*chro*mat"ic (?), a. [Iso- + chromatic.] (Opt.) 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.
I*soch"ro*nal (?), a. [See Isochronous.] Uniform in time; of equal
time; performed in equal times; recurring at regular intervals; as,
isochronal vibrations or oscillations.
I`so*chron"ic (?), a. Isochronal.
I*soch"ro*nism (?), n. The state or quality of being isochronous.
I*soch"ro*non (?), n. [NL. See Isochronous.] A clock that is designed
to keep very accurate time.
I*soch"ro*nous (?), a. [Gr. &?;; &?; equal + &?; time.] Same as
Isochronal.
I*soch"ro*ous (?), a. [Iso- + Gr. &?; color.] Having the same tint or
color throughout; uniformly or evenly colored.
{ I`so*cli"nal (?), I`so*clin"ic (?), } a. [Iso- + Gr. &?; to incline.]
Of or pertaining to, or indicating, equality of inclination or dip;
having equal inclination or dip.
Isoclinal lines (Magnetism), lines on the earth's surface connecting
places at which a dipping needle indicates the same inclination or dip.
I`so*cry"mal (?), a. (Phys. Geog.) Pertaining to, having the nature of,
or illustrating, an isocryme; as, an isocrymal line; an isocrymal
chart.
I"so*cryme (?), n. [Iso- + Gr. &?; cold.] (Phys. Geog.) A line
connecting points on the earth's surface having the same mean
temperature in the coldest month of the year.
I`so*crym"ic (?), a. Isocrymal.
I`so*cy*an"ic (?), a. [Iso- + cyanic.] (Chem.) Designating an acid
isomeric with cyanic acid.
Isocyanic acid, an acid metameric with cyanic acid, and resembling it
in its salts. It is obtained as a colorless, mobile, unstable liquid by
the heating cyanuric acid. Called technically carbimide.
I`so*cy`a*nu"ric (?), a. [Iso- + cyanuric.] (Chem.) Designating, or
pertaining to, an acid isomeric with cyanuric acid, and called also
fulminuric acid. See under Fulminuric.
I`so*di`a*bat"ic (?), a. [Iso- + Gr. &?; to pass through.] (Physics)
Pertaining to the reception or the giving out of equal quantities of
heat by a substance. Rankine.
Isodiabatic lines or curves, a pair of lines or curves exhibiting, on a
diagram of energy, the law of variation of the pressure and density of
a fluid, the one during the lowering, and the other during the raising,
of its temperature, when the quantity of heat given out by the fluid
during any given stage of the one process is equal to the quantity
received during the corresponding stage of the other. Such lines are
said to be isodiabatic with respect to each other. Compare Adiabatic.