<B>azeotropic, </B>adjective.<DL COMPACT><DD> (Chemistry.) having to do with or resembling an azeotrope. </DL>
<A NAME="azerbaijani">
<B>Azerbaijani</B> or <B>Azerbaidzhani, </B>noun.<DL COMPACT><DD><B> 1. </B>a native or inhabitant of Azerbaijan, a republic of the former U.S.S.R. and a province in northwest Iran. <DD><B> 2. </B>a Turkic language spoken in Azerbaijan. </DL>
<A NAME="azerbaijanian">
<B>Azerbaijanian</B> or <B>Azerbaidzhanian, </B>noun. =Azerbaijani.</DL>
<A NAME="azide">
<B>azide, </B>noun.<DL COMPACT><DD> any one of various salts of hydrazoic acid. </DL>
<A NAME="azidothymidine">
<B>azidothymidine, </B>noun.<DL COMPACT><DD> an antiviral drug used in the treatment of AIDS. <BR> <I>Ex. While azidothymidine is the first drug shown to benefit AIDS victims, researchers ... emphasized that it is not a cure (Science News).</I> </DL>
<A NAME="azilian">
<B>Azilian, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> of or having to do with a Stone Age culture in transition between the paleolithic and neolithic periods. <DD><I>noun </I> this culture. Also, <B>Asilian.</B> </DL>
<A NAME="azimuth">
<B>azimuth, </B>noun.<DL COMPACT><DD><B> 1. </B>(Astronomy.) the angular distance along the horizon measured from its north point toward the east to the great circle that passes through a celestial body and the zenith and is perpendicular to the horizon. <BR> <I>Ex. A star due northeast from the observer has an azimuth of 45 degrees.</I> <DD><B> 2. </B>an angle constructed in surveying between a north-south line through the observer and a line from the observer to any point on, or projected on, the earth's surface, measured clockwise, from north. </DL>
<A NAME="azimuthal">
<B>azimuthal, </B>adjective.<DL COMPACT><DD> of or in the azimuth; used in taking azimuths. adv. <B>azimuthally.</B> </DL>
<A NAME="azimuthalequidistantprojection">
<B>azimuthal equidistant projection,</B><DL COMPACT><DD> a type of map projection centered on a given point in such a way that the distance along a great circle to any other point is represented to scale on a straight line connecting the two points. </DL>
<B>azimuth circle,</B><DL COMPACT><DD><B> 1. </B>one of the great circles intersecting one another in the zenith and nadir, and cutting the horizon at right angles. <DD><B> 2. </B>a device like a gunsight mounted on a movable ring on a stand which contains a compass. By sighting through the azimuth circle, the navigator can determine the bearing of an object from his craft. </DL>
<A NAME="azin">
<B>azin, </B>noun. =azine.</DL>
<A NAME="azine">
<B>azine, </B>noun.<DL COMPACT><DD> (Chemistry.) <DD><B> 1. </B>any compound of a group of organic compounds containing a ring of six atoms, one or more of which is nitrogen. The number of nitrogen atoms present is denoted by a prefix, as in <I>diazine, triazine.</I> <DD><B> 2. </B>any compound of a group of nitrogenous compounds produced from an aldehyde or a ketone and hydrazine. </DL>
<A NAME="azo">
<B>azo, </B>adjective.<DL COMPACT><DD> (Chemistry.) containing the -N:N- group. </DL>
<A NAME="azo">
<B>azo-,</B><DL COMPACT><DD> (combining form.) azo; azote; nitrogen, as in <I>azobenzene.</I> Also, <B>az-</B> before vowels. </DL>
<A NAME="azobenzene">
<B>azobenzene, </B>noun.<DL COMPACT><DD> a yellowish-orange, crystalline compound derived from nitrobenzene, used in making dyes. </DL>
<A NAME="azodyes">
<B>azo dyes,</B><DL COMPACT><DD> a large group of synthetic dyes containing the grouping R-N:N-R, a basic structure of two atoms of nitrogen and two radicals of the benzene or naphthalene series, which can form subsequent, complex structures having a variety of dyeing properties. </DL>
<A NAME="azoic">
<B>Azoic, </B>noun, adjective.<DL COMPACT><DD><I>noun </I> <B>1. </B>the oldest geological era, when the earth had its very beginning, characterized by the absence of living things. <DD><B> 2. </B>the rocks formed in this era. <DD><I>adj. </I> of this era or these rocks. </DL>
<A NAME="azoimide">
<B>azoimide, </B>noun. =hydrazoic acid.</DL>
<A NAME="azole">
<B>azole, </B>noun.<DL COMPACT><DD> (Chemistry.) any compound of a group of organic compounds having a ring of five atoms, one or more of which is nitrogen. The number of nitrogen atoms is denoted by a prefix, as in <I>diazole, triazole.</I> </DL>
<A NAME="azonal">
<B>azonal, </B>adjective.<DL COMPACT><DD> not divided into or distinguished by zones. </DL>
<A NAME="azonic">
<B>azonic, </B>adjective.<DL COMPACT><DD> not confined to a zone or region; not local. </DL>
<A NAME="azoospermia">
<B>azoospermia, </B>noun.<DL COMPACT><DD> absence of spermatozoa in the semen. </DL>
<A NAME="azoospermic">
<B>azoospermic, </B>adjective.<DL COMPACT><DD> having no spermatozoa. <BR> <I>Ex. azoospermic semen.</I> </DL>
<A NAME="azorean">
<B>Azorean, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> of or having to do with the Azores. <DD><I>noun </I> a native or inhabitant of the Azores. </DL>
<A NAME="azote">
<B>azote, </B>noun.<DL COMPACT><DD> a former name of nitrogen. </DL>
<A NAME="azoth">
<B>azoth, </B>noun.<DL COMPACT><DD> in alchemy: <DD><B> 1. </B>mercury, as the assumed first principle of all metals. <DD><B> 2. </B>the universal remedy of Paracelsus. </DL>
<A NAME="azotic">
<B>azotic, </B>adjective.<DL COMPACT><DD> of or having to do with nitrogen. </DL>
<B>azotobacter, </B>noun.<DL COMPACT><DD> any bacterium of a genus of aerobic bacteria, able to fix atmospheric nitrogen for their own use. </DL>
<A NAME="azoturia">
<B>azoturia, </B>noun.<DL COMPACT><DD> an acute, noninfectious disease of horses occurring after enforced idleness and high feeding, and also affecting cattle. The urine is colored deep red or black. </DL>
<A NAME="azrael">
<B>Azrael, </B>noun.<DL COMPACT><DD> the angel of death, according to the Koran and in tradition, who takes the soul from the body. </DL>
<A NAME="azt">
<B>AZT</B> (no periods),<DL COMPACT><DD> (Trademark.) azidothymidine. </DL>
<A NAME="aztec">
<B>Aztec, </B>noun, adjective.<DL COMPACT><DD><I>noun </I> <B>1. </B>a member of a powerful and highly civilized American Indian people who ruled a large empire in central Mexico from about 1200 A.D. until its conquest by the Spaniards under Cortes in 1521. <DD><B> 2. </B>any member of the nation ruled by this people. <DD><B> 3. </B>their language; Nahautl. <DD><I>adj. </I> of the Aztecs or their language. <BR> <I>Ex. great stones decorated in Aztec art.</I> </DL>
<A NAME="aztecan">
<B>Aztecan, </B>adjective.<DL COMPACT><DD> Aztec or Nahuatlan. </DL>
<A NAME="azulejo">
<B>azulejo, </B>noun, pl. <B>-jos.</B><DL COMPACT><DD> a colored tile, often blue, used in Moorish architecture. </DL>
<A NAME="azure">
<B>azure, </B>noun, adjective.<DL COMPACT><DD><I>noun </I> <B>1. </B>the clear-blue color of the unclouded sky; sky blue. <DD><B> 2. </B>a bright-blue pigment or dye, especially cobalt (blue). <DD><B> 3. </B>(Heraldry.) the blue color in coats of arms, in engraving represented by horizontal lines. <DD><B> 4. </B>(Poetic.) the unclouded vault of heaven. <DD><I>adj. </I> blue like the color of the unclouded sky; sky-blue. </DL>
<B>azurite, </B>noun.<DL COMPACT><DD><B> 1. </B>a blue copper ore. It is a basic carbonate of copper. <DD><B> 2. </B>a form of this mineral used as a semiprecious stone. </DL>
