Part 4724

<h1>Gastrotrocha</h1> <Xpage=614>

<hw>Gas*trot"ro*cha</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[NL., fr. Gr. <?/, <?/, stomach + <?/ a wheel.]</ety> <fld>(Zo\'94l.)</fld> <def>A form of annelid larva having cilia on the ventral side.</def>

<h1>Gastrovascular</h1> <Xpage=614>

<hw>Gas`tro*vas"cu*lar</hw> <tt>(?)</tt>, <tt>a.</tt> <ety>[<ets>Gastro-</ets> + <ets>-vascular</ets>.]</ety> <fld>(Zo\'94l.)</fld> <def>Having the structure, or performing the functions, both of digestive and circulatory organs; <as>as, the <ex>gastrovascular</ex> cavity of c&oe;lenterates</as>.</def>

<h1>Gastrula</h1> <Xpage=614>

<hw>Gas"tru*la</hw> <tt>(?)</tt>, <tt>n.</tt>; <plu>pl</plu>. <plw>Gastrul\'91</plw> <tt>(#)</tt> <ety>[NL., dim. fr. Gr. <?/ the stomach.]</ety> <fld>(Biol.)</fld> <def>An embryonic form having its origin in the invagination or pushing in of the wall of the planula or blastula (the <i>blastosphere</i>) on one side, thus giving rise to a double-walled sac, with one opening or mouth (the <i>blastopore</i>) which leads into the cavity (the <i>archenteron</i>) lined by the inner wall (the <i>hypoblast</i>). See <i>Illust</i>. under <er>Invagination</er>. In a more general sense, an ideal stage in embryonic development. See <er>Gastr\'91a</er>.</def> -- <def2><tt>a.</tt> <def>Of or pertaining to a gastrula.</def></def2>

<hr> <page="615"> Page 615<p>

<h1>Gastrulation</h1> <Xpage=615>

<hw>Gas`tru*la"tion</hw> <tt>(?)</tt>, <tt>n.</tt> <fld>(Biol.)</fld> <def>The process of invagination, in embryonic development, by which a gastrula is formed.</def>

<h1>Gastrura</h1> <Xpage=615>

<hw>Gas*tru"ra</hw> <tt>(?)</tt>, <tt>n. pl.</tt> <ety>[NL., fr. Gr. <?/ belly + <?/ tail.]</ety> <fld>(Zo\'94l.)</fld> <def>See <er>Stomatopoda</er>.</def>

<h1>Gastrurous</h1> <Xpage=615>

<hw>Gas*tru"rous</hw> <tt>(?)</tt>, <tt>a.</tt> <fld>(Zo\'94l.)</fld> <def>Pertaining to the Gastrura.</def>

<h1>Gat</h1> <Xpage=615>

<hw>Gat</hw> <tt>(?)</tt>, <def><tt>imp.</tt> of <er>Get</er>.</def> <mark>[Obs.]</mark>

<h1>Gate</h1> <Xpage=615>

<hw>Gate</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[OE. <?/<ets>et</ets>, <ets><?/eat</ets>, <ets>giat</ets>, gate, door, AS. <ets>geat</ets>, <ets>gat</ets>, gate, door; akin to OS., D., & Icel. <ets>gat</ets> opening, hole, and perh. to E. <ets>gate</ets> a way, <ets>gait</ets>, and <ets>get</ets>, v. Cf. <er>Gate</er> a way in the wall, 3d <er>Get</er>.]</ety> <p><b>1.</b> <def>A large door or passageway in the wall of a city, of an inclosed field or place, or of a grand edifice, etc.; also, the movable structure of timber, metal, etc., by which the passage can be closed.</def>

<p><b>2.</b> <def>An opening for passage in any inclosing wall, fence, or barrier; or the suspended framework which closes or opens a passage. Also, figuratively, a means or way of entrance or of exit.</def>

<blockquote>Knowest thou the way to Dover? Both stile and <b>gate</b>, horse way and footpath. <i>Shak.</i></blockquote>

<blockquote>Opening a <b>gate</b> for a long war. <i>Knolles.</i></blockquote>

<p><b>3.</b> <def>A door, valve, or other device, for stopping the passage of water through a dam, lock, pipe, etc.</def>

<p><b>4.</b> <fld>(Script.)</fld> <def>The places which command the entrances or access; hence, place of vantage; power; might.</def>

<blockquote>The <b>gates</b> of hell shall not prevail against it. <i>Matt. xvi. 18.</i></blockquote>

<p><b>5.</b> <def>In a lock tumbler, the opening for the stump of the bolt to pass through or into.</def>

<p><b>6.</b> <fld>(Founding)</fld> <sd>(a)</sd> <def>The channel or opening through which metal is poured into the mold; the ingate.</def> <sd>(b)</sd> <def>The waste piece of metal cast in the opening; a sprue or sullage piece.</def> <altsp>[Written also <asp>geat</asp> and <asp>git</asp>.]</altsp>

<cs><col>Gate chamber</col>, <cd>a recess in the side wall of a canal lock, which receives the opened gate.</cd> -- <col>Gate channel</col>. <cd>See <er>Gate</er>, 5.</cd> -- <col>Gate hook</col>, <cd>the hook-formed piece of a gate hinge.</cd> -- <col>Gate money</col>, <cd>entrance money for admission to an inclosure.</cd> -- <col>Gate tender</col>, <cd>one in charge of a gate, as at a railroad crossing.</cd> -- <col>Gate valva</col>, <cd>a stop valve for a pipe, having a sliding gate which affords a straight passageway when open.</cd> -- <col>Gate vein</col> <fld>(Anat.)</fld>, <cd>the portal vein.</cd> -- <col>To break gates</col> <fld>(Eng. Univ.)</fld>, <cd>to enter a college inclosure after the hour to which a student has been restricted.</cd> -- <mcol><col>To stand in the</col> <col>gate, &or; gates</col></mcol>, <cd>to occupy places or advantage, power, or defense.</cd></cs>

<h1>Gate</h1> <Xpage=615>

<hw>Gate</hw>, <tt>v. t.</tt> <p><b>1.</b> <def>To supply with a gate.</def>