Part 1904

<p><b>2.</b> <fld>(Chem.)</fld> <def>A compound or salt of chromous hydroxide regarded as an acid.</def> <mark>[R.]</mark>

<h1>Chromium</h1> <Xpage=253>

<hw>Chro"mi*um</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[NL., fr. Gr. <?/ color.]</ety> <fld>(Chem.)</fld> <def>A comparatively rare element occurring most abundantly in the mineral chromite. Atomic weight 52.5. Symbol Cr. When isolated it is a hard, brittle, grayish white metal, fusible with difficulty. Its chief commercial importance is for its compounds, as potassium chromate, lead chromate, etc., which are brilliantly colored and are used dyeing and calico printing. Called also <altname>chrome</altname>.</def> <-- used as an ingredient in stainless steel, or chrome steel. The yellow pigments are also used in paints, as in painting yellow stripes on macadam highways. -->

<h1>Chromo</h1> <Xpage=253>

<hw>Chro"mo</hw> <tt>(?)</tt>, <tt>n.</tt>; <plu>pl. <plw>Chromos</plw> <tt>(#)</tt>.</plu> <ety>[Abbrev. from <ets>chromo</ets>lithograph.]</ety> <def>A chromolithograph.</def>

<h1>Chromoblast</h1> <Xpage=253>

<hw>Chro"mo*blast</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[Gr. <?/ color + <ets>-blast</ets>.]</ety> <def>An embryonic cell which develops into a pigment cell.</def>

<h1>Chromogen</h1> <Xpage=253>

<hw>Chro"mo*gen</hw> <tt>(?)</tt>, <ety>[Gr. <?/ color + <ets>-gen</ets>.]</ety>

<p><b>1.</b> <fld>(Biol.)</fld> <def>Vegetable coloring matter other than green; chromule.</def>

<p><b>2.</b> <fld>(Chem.)</fld> <def>Any colored compound, supposed to contain one or more chromophores.</def>

<h1>Chromogenic</h1> <Xpage=253>

<hw>Chro"mo*gen"ic</hw> <tt>(?)</tt>, <tt>a.</tt> <fld>(Biol.)</fld> <def>Containing, or capable of forming, chromogen; <as>as, <ex>chromogenic</ex> bacteria</as>.</def>

<h1>Chromograph</h1> <Xpage=253>

<hw>Chro"mo*graph</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[Gr. <?/ color + <ets>-graph</ets>.]</ety> <def>An apparatus by which a number of copies of written matter, maps, plans, etc., can be made; -- called also <altname>hectograph</altname>.</def>

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<h1>Chromoleucite</h1> <Xpage=254>

<hw>Chro`mo*leu"cite</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[Gr. <?/ color + E. <ets>leucite</ets>.]</ety> <fld>(Bot.)</fld> <def>A chromoplastid.</def>

<h1>Chromolithograph</h1> <Xpage=254>

<hw>Chro`mo*lith"o*graph</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[Gr. <?/ color + E. <ets>lithograph</ets>.]</ety> <def>A picture printed in tints and colors by repeated impressions from a series of stones prepared by the lithographic process.</def>

<h1>Chromolithographer</h1> <Xpage=254>

<hw>Chro`mo*li*thog"ra*pher</hw> <tt>(?)</tt>, <tt>n.</tt> <def>One who is engaged in chromolithography.</def>

<h1>Chromolithographic</h1> <Xpage=254>

<hw>Chro"mo*lith`o*graph"ic</hw> <tt>(?)</tt>, <tt>a.</tt> <def>Pertaining to, or made by, chromolithography.</def>

<h1>Chromolithohraphy</h1> <Xpage=254>

<hw>Chro"mo*li*thoh"ra*phy</hw> <tt>(?)</tt>, <tt>n.</tt> <def>Lithography adapted to printing in inks of various colors.</def>

<h1>Chromophane</h1> <Xpage=254>

<hw>Chro"mo*phane</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[Gr. <?/ color + <?/ to show.]</ety> <fld>(Physiol.)</fld> <def>A general name for the several coloring matters, red, green, yellow, etc., present in the inner segments in the cones of the retina, held in solution by fats, and slowly decolorized by light; distinct from the photochemical pigments of the rods of the retina.</def>