Part 5469

<hw>Hy`dro*ce*phal"ic</hw> <tt>(?)</tt>, <tt>a.</tt> <def>Relating to, or connected with, hydrocephalus, or dropsy of the brain.</def>

<h1>Hydrocephaloid</h1> <Xpage=716>

<hw>Hy`dro*ceph"a*loid</hw> <tt>(?)</tt>, <tt>a.</tt> <ety>[<ets>Hydrocephalus</ets> + -<ets>oid</ets>.]</ety> <fld>(Med.)</fld> <def>Resembling hydrocephalus.</def>

<cs><col>Hydrocephaloid affection</col> <fld>(Med.)</fld>, <cd>the group of symptoms which follow exhausting diarrhea in young children, resembling those of acute hydrocephalus, or tubercular meningitis.</cd></cs>

<h1>Hydrocephalous</h1> <Xpage=716>

<hw>Hy`dro*ceph"a*lous</hw> <tt>(?)</tt>, <tt>a.</tt> <def>Having hydrocephalus.</def> "<i>Hydrocephalous</i> offspring."

<i>G. Eliot.</i>

<h1>Hydrocephalus</h1> <Xpage=716>

<hw>Hy`dro*ceph"a*lus</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[NL., fr. Gr. <?/ hydrocephalus; <grk>"y`dwr</grk> water + <?/ head.]</ety> <fld>(Med.)</fld> <def>An accumulation of liquid within the cavity of the cranium, especially within the ventricles of the brain; dropsy of the brain. It is due usually to tubercular meningitis. When it occurs in infancy, it often enlarges the head enormously.</def>

<h1>Hydrochlorate</h1> <Xpage=716>

<hw>Hy`dro*chlo"rate</hw> <tt>(?)</tt>, <tt>n.</tt> <fld>(Chem.)</fld> <def>Same as <er>Hydrochloride</er>.</def>

<h1>Hydrochloric</h1> <Xpage=716>

<hw>Hy`dro*chlo"ric</hw> <tt>(?)</tt>, <tt>a.</tt> <ety>[<ets>Hydro-</ets>, 2 + <ets>hloric</ets>: cf. F. <ets>hydrochlorique</ets>.]</ety> <fld>(Chem.)</fld> <def>Pertaining to, or compounded of, chlorine and hydrogen gas; <as>as, <ex>hydrochloric</ex> acid</as>; chlorhydric.</def>

<cs><col>Hydrochloric acid</col> <fld>(Chem.)</fld>, <cd>hydrogen chloride; a colorless, corrosive gas, <chform>HCl</chform>, of pungent, suffocating odor. It is made in great quantities in the soda process, by the action of sulphuric acid on common salt. It has a great affinity for water, and the commercial article is a strong solution of the gas in water. It is a typical acid, and is an indispensable agent in commercial and general chemical work. Called also <altname>muriatic, &and; chlorhydric, acid</altname>.</cd></cs>

<h1>Hydrochloride</h1> <Xpage=716>

<hw>Hy`dro*chlo"ride</hw> <tt>(?)</tt>, <tt>n.</tt> <fld>(Chem.)</fld> <def>A compound of hydrochloric acid with a base; -- distinguished from a <i>chloride</i>, where only chlorine unites with the base.</def>

<h1>Hydrocorallia</h1> <Xpage=716>

<hw>Hy`dro*co*ral"li*a</hw> <tt>(?)</tt>, <tt>n. pl.</tt> <ety>[NL. See <er>Hydra</er>, and <er>Coral</er>.]</ety> <fld>(Zo\'94l.)</fld> <def>A division of Hydroidea, including those genera that secrete a stony coral, as <i>Millepora</i> and <i>Stylaster</i>. Two forms of zooids in life project from small pores in the coral and resemble those of other hydroids. See <er>Millepora</er>.</def>

<h1>Hydrocyanate</h1> <Xpage=716>

<hw>Hy`dro*cy"a*nate</hw> <tt>(?)</tt>, <tt>n.</tt> <fld>(Chem.)</fld> <def>See <er>Hydrocyanide</er>.</def>

<h1>Hydrocyanic</h1> <Xpage=716>

<hw>Hy`dro*cy*an"ic</hw> <tt>(?)</tt>, <tt>a.</tt> <ety>[<ets>Hydro-</ets>, 2 + <ets>anic</ets>: cf. F. <ets>hydrocyanique</ets>.]</ety> <fld>(Chem.)</fld> <def>Pertaining to, or derived from the combination of, hydrogen and cyanogen.</def>

<cs><col>Hydrocyanic acid</col> <fld>(Chem.)</fld>, <cd>a colorless, mobile, volatile liquid, <chform>HCN</chform>, having a characteristic peach-blossom odor. It is one of the most deadly poisons. It is made by the action of sulphuric acid on yellow prussiate of potassium (potassium ferrocyanide), and chemically resembles hydrochloric and hydrobromic acids. Called also <altname>prussic acid</altname>, <altname>hydrogen cyanide</altname>, etc.</cd></cs>

<h1>Hydrocyanide</h1> <Xpage=716>

<hw>Hy`dro*cy"a*nide</hw> <tt>(?)</tt>, <tt>n.</tt> <fld>(Chem.)</fld> <def>A compound of hydrocyanic acid with a base; -- distinguished from a <i>cyanide</i>, in which only the cyanogen so combines.</def>

<h1>Hydrodynamic, Hydrodynamical</h1> <Xpage=716>

<hw><hw>Hy`dro*dy*nam"ic</hw> <tt>(?)</tt>, <hw>Hy`dro*dy*nam"ic*al</hw> <tt>(?)</tt>,<hw> <tt>a.</tt> <ety>[<ets>Hydro-</ets>, 1 + <ets>dynamic</ets>, -<ets>ical</ets>: cf. F. <ets>hydrodynamique</ets>.]</ety> <def>Pertaining to, or derived from, the dynamical action of water of a liquid; of or pertaining to water power.</def>

<cs><col>Hydrodynamic friction</col>, <cd>friction produced by the viscosity of a liquid in motion.</cd></cs>