<B>arbitrate, </B>verb, <B>-trated,</B> <B>-trating.</B><DL COMPACT><DD><I>v.i. </I> <B>1. </B>to give a decision in a dispute; act as arbitrator; mediate. <BR> <I>Ex. The teacher arbitrated between the two boys in their quarrel. The governor offered to arbitrate between the city and the county in their dispute.</I> (SYN) judge. <DD><B> 2. </B>to submit a matter to arbitration. <DD><I>v.t. </I> <B>1. </B>to submit to arbitration; settle by arbitration. <BR> <I>Ex. The two nations finally agreed to arbitrate their dispute, and war was avoided.</I> <DD><B> 2. </B>to give an expert or official decision in regard to; decide or determine. (SYN) adjudicate. </DL>
<A NAME="arbitration">
<B>arbitration, </B>noun.<DL COMPACT><DD> the settlement of a dispute by the decision of somebody chosen to be the judge, umpire, or arbiter. <BR> <I>Ex. to submit the points in a dispute to arbitration. The strike was settled by arbitration. Arbitration differs from mediation in that a definite decision on the issue is handed down by the individuals who serve as arbitrators, and the decision is regarded as binding on the contestants (Ogburn and Nimkoff).</I> </DL>
<A NAME="arbitrational">
<B>arbitrational, </B>adjective.<DL COMPACT><DD><B> 1. </B>of or involving arbitration. <DD><B> 2. </B>resulting from arbitration. </DL>
<A NAME="arbitrative">
<B>arbitrative, </B>adjective.<DL COMPACT><DD> having power to arbitrate; done by arbitration. </DL>
<A NAME="arbitrator">
<B>arbitrator, </B>noun.<DL COMPACT><DD><B> 1. </B>a person chosen to decide or settle a dispute. <BR> <I>Ex. A mediator seeks to bring the two sides in a labor dispute together. An arbitrator hears evidence and makes specific recommendations for settlement (Wall Street Journal).</I> (SYN) umpire, judge. <DD><B> 2. </B>a person with full power to judge or decide; arbiter. noun <B>arbitratorship.</B> </DL>
<A NAME="arbitress">
<B>arbitress, </B>noun.<DL COMPACT><DD> a woman arbiter or arbitrator. </DL>
<A NAME="arboloco">
<B>arboloco, </B>noun.<DL COMPACT><DD> a South and Central American composite tree, whose hard wood is used for billiard cues. </DL>
<A NAME="arbor">
<B>arbor</B> (1), noun.<DL COMPACT><DD><B> 1a. </B>a shady place formed by trees or shrubs or often by vines growing on latticework. <DD><B> b. </B>the latticework itself. <DD><B> 2. </B>(Obsolete.) <DD><B> a. </B>a plot of ground covered with grass or turf. <DD><B> b. </B>a flower garden. <DD><B> c. </B>an orchard. Also, (British,) <B>arbour.</B> </DL>
<A NAME="arbor">
<B>arbor</B> (2), noun.<DL COMPACT><DD><B> 1. </B>the main shaft or axle of a machine which transmits mechanical force to other moving parts. <DD><B> 2. </B>the axle or spindle on which a wheel revolves, especially in clocks and watches. <DD><B> 3. </B>in the machining of metal and other materials: <DD><B> a. </B>a shaft that holds the cutting tool or tools. <DD><B> b. </B>a shaft or bar (mandrel) forced into an object to support it while it is turned. <DD><B> 4. </B>a cork cylinder used to build up a bait-casting reel so that the spool will be half filled with an older line. </DL>
<A NAME="arbor">
<B>arbor</B> (3), noun, pl. <B>arbores.</B><DL COMPACT><DD> a tree (used chiefly as part of various names in botany). </DL>
<B>Arbor Day,</B><DL COMPACT><DD> a day observed by planting trees in many states of the United States and provinces of Canada, in New Zealand, and in parts of Australia. The date varies in different places. </DL>
<A NAME="arboreal">
<B>arboreal, </B>adjective.<DL COMPACT><DD><B> 1. </B>living in or among trees. A squirrel is an arboreal animal. <DD><B> 2. </B>of or like trees. adv. <B>arboreally.</B> </DL>
<A NAME="arbored">
<B>arbored, </B>adjective.<DL COMPACT><DD><B> 1. </B>placed in or as if in an arbor; arched over; embowered. <DD><B> 2. </B>furnished with an arbor or arbors. Also, (British,) <B>arboured.</B> </DL>
<B>arbores, </B>noun.<DL COMPACT><DD> plural of <B>arbor</B> (3). </DL>
<A NAME="arboresce">
<B>arboresce, </B>intransitive verb, <B>-resced,</B> <B>-rescing.</B><DL COMPACT><DD> to take the form of a tree. </DL>
<A NAME="arborescence">
<B>arborescence, </B>noun.<DL COMPACT><DD> the state of being arborescent. </DL>
<A NAME="arborescent">
<B>arborescent, </B>adjective.<DL COMPACT><DD> like a tree in structure, growth, or appearance; branching. </DL>
<A NAME="arboretum">
<B>arboretum, </B>noun, pl. <B>-tums,</B> <B>-ta.</B><DL COMPACT><DD> a place where trees and shrubs, especially rare ones, are grown and exhibited for scientific, educational, and other purposes. </DL>
<B>arboricultural, </B>adjective.<DL COMPACT><DD> of or having to do with arboriculture. </DL>
<A NAME="arboriculture">
<B>arboriculture, </B>noun.<DL COMPACT><DD> the cultivation of trees and shrubs for use or ornament. </DL>
<A NAME="arboriculturist">
<B>arboriculturist, </B>noun.<DL COMPACT><DD> a person who studies arboriculture. </DL>
<A NAME="arboriform">
<B>arboriform, </B>adjective.<DL COMPACT><DD> having the form of a tree. </DL>
<A NAME="arborist">
<B>arborist, </B>noun.<DL COMPACT><DD><B> 1. </B>a person who studies or cultivates trees. <DD><B> 2. </B>(Rare.) a herbalist. </DL>
<A NAME="arborization">
<B>arborization, </B>noun.<DL COMPACT><DD><B> 1. </B>a growth or an appearance resembling the figure of a tree or plant, as in certain minerals or fossils. <DD><B> 2. </B>the process of growing into this shape or of developing such an appearance. </DL>
<A NAME="arborize">
<B>arborize, </B>intransitive verb, <B>-rized,</B> <B>-rizing.</B><DL COMPACT><DD> to have or produce branching formations. <BR> <I>Ex. The airways of the lung ... arborize like a tree (New Scientist).</I> </DL>
<B>arbor vitae,</B> or <B>arborvitae, </B>noun.<DL COMPACT><DD><B> 1. </B>any one of various evergreen trees, especially the white cedar, a common American species with many horticultural varieties, often planted for ornament and for hedges, and the red cedar or giant arbor vitae of the western United States. <DD><B> 2. </B>a treelike appearance, such as that of the cerebellum, produced by the arrangement of the white and gray nerve tissue. </DL>
<B>arbovirus, </B>noun.<DL COMPACT><DD> any one of a group of viruses usually transmitted by ticks, fleas, perhaps other arthropods, and by some unknown means. Some hemorrhagic fevers and hantavirus are classified as arboviruses; now distinct from togaviruses. </DL>
<A NAME="arbuscle">
<B>arbuscle, </B>noun.<DL COMPACT><DD> a dwarf tree or a shrub of treelike growth. </DL>
<A NAME="arbute">
<B>arbute, </B>noun.<DL COMPACT><DD> (Poetic.) the European arbutus. </DL>
<A NAME="arbutus">
<B>arbutus, </B>noun.<DL COMPACT><DD><B> 1. </B>a trailing plant of eastern North America, that has clusters of fragrant, pink or white flowers very early in the spring; mayflower; trailing arbutus. The arbutus belongs to the same family as the heath. It is the state flower of Massachusetts and provincial flower of Nova Scotia. <DD><B> 2. </B>any one of several evergreen shrubs or trees of the heath family, having clusters of large, white or pink flowers and red berries, such as the strawberry tree and the madrona. </DL>
<A NAME="arc">
<B>arc, </B>noun, verb, <B>arced,</B> <B>arcing,</B> or <B>arcked,</B> <B>arcking.</B><DL COMPACT><DD><I>noun </I> <B>1. </B>any part of the circumference of a circle. <DD><B> 2. </B>any part of any curved line. <DD><B> 3. </B>a curved stream of brilliant light or sparks formed as a strong electric current jumps from one conductor to another. <BR> <I>Ex. a carbon arc.</I> <DD><B> 4a. </B>the part of a circle which a heavenly body appears to pass through above the horizon; diurnal arc. <DD><B> b. </B>the part of the same circle below the horizon; nocturnal arc. <DD><B> 5. </B>a band or belt between concentric curves or something having this form. <BR> <I>Ex. You see a rainbow as an arc when the sun is behind you and the sky in front of you is filled with moisture (Walter J. Saucier).</I> <DD><I>v.i. </I> <B>1. </B>to form an electric arc. <DD><B> 2. </B>to take or follow a curved path. <BR> <I>Ex. Ranger 6 arced on a graceful, curving course toward the moon (Time).</I> adj. <B>arclike.</B> </DL>
<A NAME="arc">
<B>ARC, </B>noun.<DL COMPACT><DD> AIDS-related complex, a milder form of AIDS, characterized by swollen glands, loss of weight, and weakness. </DL>
<A NAME="arcade">
<B>arcade, </B>noun, verb, <B>-caded,</B> <B>-cading.</B><DL COMPACT><DD><I>noun </I> <B>1. </B>a passageway with an arched roof. <DD><B> 2. </B>a building having such a passageway. <DD><B> 3. </B>any covered passageway. <BR> <I>Ex. Some buildings have arcades with small stores along either side.</I> (SYN) gallery. <DD><B> 4. </B>a row of arches supported by columns or piers. (SYN) colonnade. <DD><I>v.t. </I> to furnish with, or form into, an arcade. </DL>
<A NAME="arcadia">
<B>Arcadia, </B>noun.<DL COMPACT><DD> any region of simple, quiet contentment (from a region of ancient Greece famous in tradition for the simple, contented life of its pastoral people). </DL>
<A NAME="arcadian">
<B>Arcadian, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> <B>1. </B>of Arcadia. <DD><B> 2. </B>like that of Arcadia; ideally rural; rustic. <DD><B> 3. </B>having to do with simple, quiet contentment. <DD><I>noun </I> <B>1. </B>an inhabitant of Arcadia. <DD><B> 2. </B>a person with simple, rural tastes. </DL>
<A NAME="arcadianism">
<B>arcadianism, </B>noun.<DL COMPACT><DD> rustic or pastoral simplicity, especially inliterature. <BR> <I>Ex. A spirit of lyrical pathos, and of poetical arcadianism (David Masson).</I> </DL>
<B>arcana, </B>noun pl.<DL COMPACT><DD> profound secrets. <BR> <I>Ex. (Figurative.) The arcana of psychoanalysis have formed the basis for a whole generation's small talk (Reporter).</I> </DL>
