Part 5241

<h1>Heptagonal</h1> <Xpage=686>

<hw>Hep*tag"o*nal</hw> <tt>(?)</tt>, <tt>a.</tt> <ety>[Cf. F. <ets>heptagonal</ets>.]</ety> <def>Having seven angles or sides.</def>

<cs><col>Heptagonal numbers</col> <fld>(Arith.)</fld>, <cd>the numbers of the series 1, 7, 18, 34, 55, etc., being figurate numbers formed by adding successively the terms of the arithmetical series 1, 6, 11, 16, 21, etc.</cd></cs>

<h1>Heptagynia</h1> <Xpage=686>

<hw>Hep`ta*gyn"i*a</hw> <tt>(?)</tt>, <tt>n. pl.</tt> <ety>[NL., fr. Gr. <grk>"epta`</grk> seven + <?/ woman, female: cf. F. <ets>heptagunie</ets>.]</ety> <fld>(Bot.)</fld> <def>A Linn\'91an order of plants having seven pistils.</def>

<h1>Heptagynian, Heptagynous</h1> <Xpage=686>

<hw><hw>Hep`ta*gyn"i*an</hw> <tt>(?)</tt>, <hw>Hep*tag"y*nous</hw> <tt>(?)</tt>,<hw> <tt>a.</tt> <ety>[Cf. F. <ets>heptagyne</ets>.]</ety> <fld>(Bot.)</fld> <def>Having seven pistils.</def>

<h1>Heptahedron</h1> <Xpage=686>

<hw>Hep`ta*he"dron</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[<ets>Hepta-</ets> + Gr. <?/ seat, base, fr. <?/ to sit: cf. F. <ets>hepta\'8adre</ets>.]</ety> <fld>(Geom.)</fld> <def>A solid figure with seven sides.</def>

<h1>Heptamerous</h1> <Xpage=686>

<hw>Hep*tam"er*ous</hw> <tt>(?)</tt>, <tt>a.</tt> <ety>[<ets>Hepta-</ets> + Gr. <?/ part.]</ety> <fld>(Bot.)</fld> <def>Consisting of seven parts, or having the parts in sets of sevens.</def>

<i>Gray.</i>

<h1>Heptandria</h1> <Xpage=686>

<hw>Hep*tan"dri*a</hw> <tt>(?)</tt>, <tt>n. pl.</tt> <ety>[NL., fr. Gr. <grk>"epta`</grk> seven + <?/, <?/, man, male: cf. F. <ets>heptandrie</ets>.]</ety> <fld>(Bot.)</fld> <def>A Linn\'91an class of plants having seven stamens.</def>

<h1>Heptandrian, Heptandrous</h1> <Xpage=686>

<hw><hw>Hep*tan"dri*an</hw> <tt>(?)</tt>, <hw>Hep*tan"drous</hw> <tt>(?)</tt>,<hw> <tt>a.</tt> <ety>[Cf. F. <ets>heptandre</ets>.]</ety> <fld>(Bot.)</fld> <def>Having seven stamens.</def>

<h1>Heptane</h1> <Xpage=686>

<hw>Hep"tane</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[Gr. <grk>"epta`</grk> seven.]</ety> <fld>(Chem.)</fld> <def>Any one of several isometric hydrocarbons, <chform>C7H16</chform>, of the paraffin series (nine are possible, four are known); -- so called because the molecule has <i>seven</i> carbon atoms. Specifically, a colorless liquid, found as a constituent of petroleum, in the tar oil of cannel coal, etc.</def>

<h1>Heptangular</h1> <Xpage=686>

<hw>Hep*tan"gu*lar</hw> <tt>(?)</tt>, <tt>a.</tt> <ety>[<ets>Hepta-</ets> + <ets>angular</ets>: cf. F. <ets>heptangulaire</ets>. Cf. <er>Septangular</er>.]</ety> <def>Having seven angles.</def>

<h1>Heptaphyllous</h1> <Xpage=686>

<hw>Hep*taph"yl*lous</hw> <tt>(?)</tt>, <tt>a.</tt> <ety>[<ets>Hepta-</ets> + Gr. <?/ leaf: cf. F. <ets>heptaphylle</ets>.]</ety> <fld>(Bot.)</fld> <def>Having seven leaves.</def>

<h1>Heptarch</h1> <Xpage=686>

<hw>Hep"tarch</hw> <tt>(?)</tt>, <tt>n.</tt> <def>Same as <er>Heptarchist</er>.</def>

<h1>Heptarchic</h1> <Xpage=686>

<hw>Hep*tar"chic</hw> <tt>(?)</tt>, <tt>a.</tt> <ety>[Cf. F. <ets>heptarchique</ets>.]</ety> <def>Of or pertaining to a heptarchy; constituting or consisting of a heptarchy.</def>

<i>T. Warton.</i>

<h1>Heptarchist</h1> <Xpage=686>