Part 5519

<cs><col>Regular icosahedron</col>, <cd>one of the five regular polyhedrons, bounded by twenty equilateral triangules. Five triangules meet to form each solid angle of the polyhedron.</cd></cs>

<h1>Icosandria</h1> <Xpage=724>

<hw>I`co*san"dri*a</hw> <tt>(?)</tt>, <tt>n. pl.</tt> <ety>[NL., fr. Gr. <?/ twenty +<?/, <?/, man, male: cf. F. <ets>icosandrie</ets>.]</ety> <fld>(Bot.)</fld> <def>A Linn\'91an class of plants, having twenty or more stamens inserted in the calyx.</def>

<h1>Icosandrian, Icosandrous</h1> <Xpage=724>

<hw><hw>I`co*san"dri*an</hw> <tt>(?)</tt>, <hw>I`co*san"drous</hw> <tt>(?)</tt>,<hw> <tt>a.</tt> <fld>(Bot.)</fld> <def>Pertaining to the class Icosandria; having twenty or more stamens inserted in the calyx.</def>

<h1>Icositetrahedron</h1> <Xpage=724>

<hw>I`co*si*tet`ra*he"dron</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[Gr. <?/ twenty + <?/, combining form of <?/ four + <?/ seat, base.]</ety> <fld>(Crystallog.)</fld> <def>A twenty-four-sided solid; a tetragonal trisoctahedron or trapezohedron.</def>

<h1>-ics</h1> <Xpage=724>

<hw>-ics</hw> <tt>(?)</tt><def>. A suffix used in forming the names of certain sciences, systems, etc., as acoust<i>ics</i>, mathemat<i>ics</i>, dynam<i>ics</i>, statist<i>ics</i>, polit<i>ics</i>, athlet<i>ics</i>.</def>

<note>&hand; The names sciences ending in <i>ics</i>, as <i>mathematics</i>, <i>mechanics</i>, <i>metaphysics</i>, <i>optics</i>, etc., are, with respect to their form, nouns in the plural number. The plural form was probably introduced to mark the complex nature of such sciences; and it may have been in imitation of the use of the Greek plurals <?/, <?/, <?/, <?/, etc., to designate parts of Aristotle's writings. Previously to the present century, nouns ending in <i>ics</i> were construed with a verb or a pronoun in the plural; but it is now generally considered preferable to treat them as singular. In Greman we have <i>die Mathematik</i>, <i>die Mechanik</i>, etc., and in French <i>la metaphysique</i>, <i>la optique</i>, etc., corresponding to our <i>mathematics</i>, <i>mechanics</i>, <i>metaphysics</i>, <i>optics</i>, etc.

<blockquote><b>Mathematics have</b> for their object the consideration of whatever is capable of being numbered or measured. <i>John Davidson.</i></blockquote>

The citations subjoined will serve as examples of the best present usage.

<blockquote>Ethics is the sciences of the laws which govern our actions as moral agents. <i>Sir W. Hamilton.</i></blockquote>

<blockquote>All parts of knowledge have their origin in <b>metaphysics</b>, and finally, perhaps, revolve into <b>it</b>. <i>De Quincey.</i></blockquote>

<blockquote><b>Mechanics</b>, like pure <b>mathematics</b>, may be geometrical, or may be analytical; that is, <b>it</b> may treat space either by a direct consideration of its properties, or by a symbolical representation. <i>Whewell.</i></blockquote> </note>

<hr> <page="725"> Page 725<p>

<h1>Icteric</h1> <Xpage=725>

<hw>Ic*ter"ic</hw> <tt>(?)</tt>, <tt>n.</tt> <def>A remedy for the jaundice.</def>

<h1>Icteric, Icterical</h1> <Xpage=725>

<hw><hw>Ic*ter"ic</hw> <tt>(?)</tt>, <hw>Ic*ter"ic*al</hw> <tt>(?)</tt>,<hw> <tt>a.</tt> <ety>[L. <ets>ictericus</ets>, Gr. <?/, fr. <?/ jaundice: cf. F. <ets>ict\'82rique</ets>.]</ety> <p><b>1.</b> <def>Pertaining to, or affected with, jaundice.</def>

<p><b>2.</b> <def>Good against the jaundice.</def>

<i>Johnson.</i>

<h1>Icteritious, Icteritous</h1> <Xpage=725>

<hw><hw>Ic`ter*i"tious</hw> <tt>(?)</tt>, <hw>Ic*ter"i*tous</hw> <tt>(?)</tt>,<hw> <tt>a.</tt> <def>Yellow; of the color of the skin when it is affected by the jaundice.</def>

<h1>Icteroid</h1> <Xpage=725>

<hw>Ic"ter*oid</hw> <tt>(?)</tt>, <tt>a.</tt> <ety>[Gr. <?/ jaundice + <ets>-oid</ets>.]</ety> <def>Of a tint resembling that produced by jaundice; yellow; <as>as, an <ex>icteroid</ex> tint or complexion</as>.</def>

<h1>Icterus</h1> <Xpage=725>

<hw>Ic"te*rus</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[NL. See <er>Icteric</er>, <tt>a.</tt>]</ety> <fld>(Med.)</fld> <def>The jaundice.</def>