IODAL, [=i]'[=o]-dal, _adj._ _n._ an oily liquid compound with properties
like chloral, obtained by treating iodine with alcohol and nitric acid.
IODINE, [=i]'o-din, _n._ one of the four non-metallic elements, so named
from the violet colour of its vapour.--_n._ I'OD[=A]TE, a combination of
iodic acid with a salifiable base.--_adj._ IOD'IC, containing iodine.--_n._
I'OD[=I]DE, a binary compound of iodine.--_adj._ IODIF'EROUS, yielding
iodine.--_n._ I'ODISM, a morbid condition due to iodine.--_v.t._
I'OD[=I]ZE, to treat with iodine: to impregnate with iodine, as
collodion.--_n._ IOD'OFORM, a lemon-yellow crystalline substance, having a
saffron-like odour and an unpleasant iodine-like taste.--_adj._ IODOMET'RIC
(_chem._), measured by iodine.--_ns._ I'ODURE, IOD'[=U]RET, a compound of
iodine with a simple base; IOD'YRITE, a yellowish mineral composed of
iodine and silver. [Gr. _ioeid[=e]s_, violet-coloured--_ion_, a violet,
_eidos_, form.]
IOLITE, [=i]'o-l[=i]t, _n._ a transparent gem which presents a violet-blue
colour when looked at in a certain direction. [Gr. _ion_, violet, _lithos_,
stone.]
ION, [=i]'on, _n._ one of the components into which an electrolyte is
broken up on electrolysis--the _Anion_, the electro-negative component,
chemically attacking the anode, and the _Cation_, the electro-positive
component, the cathode. [Gr. _i[=o]n_, pr.p. of _ienai_, to go.]
IONIC, [=i]-on'ik, _adj._ relating to _Ionia_ in Greece: denoting an order
in architecture distinguished by the ram's-horn volute of its capital--also
I[=O]'NIAN.--_vs.t._ ION'ICIZE, I'ONIZE.--_ns._ I'ONISM; I'ONIST.--IONIC
DIALECT, the most important of the three main branches of the ancient Greek
language (Ionic, Doric, Æolic), marked by greater softness and smoothness,
the effect of its rich vowel system. Homer's _Iliad_ is written in _Old_,
the history of Herodotus in _New_ Ionic: the Attic of Thucydides and
Sophocles is its later form; IONIC MODE (see MODE); IONIC SCHOOL, a name
given to the representative philosophers of the Ionian Greeks, such as
Thales, Anaximander, Anaximenes, Heraclitus, Anaxagoras, who debated the
question what was the primordial constitutive principle of the cosmical
universe.
IOTA, [=i]-[=o]'ta, _n._ a jot: a very small quantity or degree.--_ns._
IOT'ACISM, IT'ACISM, the conversion of other vowel sounds into that of iota
(Eng. _[=e]_), as in modern Gr. of [Greek: ê], [Greek: u], [Greek: ei],
[Greek: ê], [Greek: oi], [Greek: ui]; IT'ACIST. [Gr., the smallest letter
in the alphabet, corresponding to the English _i_.]
I O U, [=i]'[=o]'[=u]', _n._ a memorandum of debt given by a borrower to a
lender, requiring no stamp, but to be holograph, dated, and addressed to
some person.
IPECACUANHA, ip-e-kak-[=u]-an'a, _n._ the name both of a very valuable
medicine and of the plant whose root produces it--used as an emetic.
[Brazilian, 'smaller roadside sick-making plant.']
IPOMÆA, ip-[=o]-m[=e]'a, _n._ a genus of nat. ord. _Convolvulaceæ_. [Gr.
_ips_, a worm, _homoios_, like.]