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area

 
Dictionary: ar·e·a   (âr'ē-ə) pronunciation
area
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area

To calculate the area of a rectangle, multiply the length by the width. The area of this rectangle is 50 square feet.
(Academy Artworks)
n.
  1. A roughly bounded part of the space on a surface; a region: a farming area; the New York area.
  2. A surface, especially an open, unoccupied piece of ground: a landing area; a playing area.
  3. A distinct part or section, as of a building, set aside for a specific function: a storage area in the basement.
  4. A division of experience, activity, or knowledge; a field: studies in the area of finance; a job in the health-care area.
  5. An open, sunken space next to a building; an areaway.
  6. (Abbr. A) The extent of a planar region or of the surface of a solid measured in square units.
  7. Computer Science. A section of storage set aside for a particular purpose.

[Latin ārea, open space, possibly akin to ārēre, to be dry. See arid.]

areal ar'e·al adj.
areally ar'e·al·ly adv.

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The superficial contents of a geometrical figure of two dimensions. The area of any rectangle or square is the product of two adjacent sides, one of which may be called the base and the other the altitude. In general, any line segment that partially bounds a plane geometric figure may be called a base if its line does not separate the figure, and a perpendicular drawn to the base line from one of its points at greatest distance may be called the altitude. Some area formulas are given in the table. See also Euclidean geometry.

Area formulas

Figure

Formula

Triangle

${hb}\over{2}$, where h = altitude, b = base; $\sqrt{s(s- a)(s-b)(s-c)}$, where s = ½(a + b + c), and a, b, and c are sides of the triangle

Rectangle

ab, where a and b are adjacent sides

Square

a2, where a = side

Parallelogram

ab sin θ, where a and b are adjacent sides, and θ is the angle between the sides

Trapezoid

½(a + b)h, where a and b are the parallel sides, and h is the altitude

Quadrilateral

½ab sin θ, where a and b are the diagonals, and θ is the angle between them

Regular polygon

¼nl2 cot ${180^\circ}\over{n}$, where n is the number of sides, each of length l

Circle

πr2, where r = radius

Ellipse

πab, where a and b are semiaxes

Sphere

r2, where r = radius

Spherical triangle

(A + B + C − π)r2, where A, B, and C are angles (radians), and r is the radius


1. Two-dimensional space defined by boundaries, such as floor area, area of a lot, and market area.

2. Scope or extent, as in area of expertise of a professional.

A two-dimensional space defined by boundaries; such as floor area, area of a lot, and market area.
Example: A rectangular lot is 50 x 100 feet in dimension. Its area is 5,000 square feet or 0.11 acre.
Example: There are 20,000 square feet of vacant office space in the market area.
Example: A large amount of the town's area is within the floodplain.

Thesaurus: area
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noun

  1. A part of the earth's surface: belt, district, locality, neighborhood, quarter, region, tract, zone. Informal neck of the woods. See territory.
  2. A surrounding site: locality, neighborhood, vicinity. See near/far/distance, place.
  3. A rather small part of a geographic unit considered in regard to its inhabitants or distinctive characteristics: district, neighborhood, quarter (often uppercase). See territory.
  4. A sphere of activity, experience, study, or interest: arena, bailiwick, circle, department, domain, field, orbit, province, realm, scene, subject, terrain, territory, world. Slang bag. See territory.

One of the basic terms of reference of spatial analysis; the other two are point and line. It may be defined as the extent of a surface or expanse of land, now usually measured in metric square units.

Architecture: area
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1. Measurement of surface within specified boundaries.
2. Space either within or outside a structure or location, designated for a specific purpose, as recreation and/or parking area.
3. An uninterrupted interior space.
4. An areaway.
5. The cross-sectional area of steel reinforcement.


 
area, measure of the size of a surface region, usually expressed in units that are the square of linear units, e.g., square feet or square meters. In elementary geometry, formulas for the areas of the simple plane figures and the surface areas of simple solids are derived from the linear dimensions of these figures. Examples are given in the table entitled Formulas for Various Areas. The areas of irregular figures, plane or solid, can be computed or closely approximated by the use of integral calculus.


Pl. areae, areas [L.] a limited space or plane surface.

  • association a's — areas of the cerebral cortex (excluding primary areas) connected with each other and with the neothalamus; they are responsible for higher mental and emotional processes, including memory, learning, etc.
  • Brodmann's a's — specific occipital and preoccipital areas of the cerebral cortex, distinguished by differences in the arrangement of their six cellular layers, and identified by numbering each area.
  • cardiogenic a. — in the embryo includes heart and pericardial rudiments.
  • central retinal a. — the area of the retina, dorsal to the optic papilla, along the optical axis. Here the retinal vessels are missing.
  • — In cattle the area is poorly defined as two areas; a rounded area concerned with binocular vision and a horizontal strip concerned wuth monocular vision.
  • a. cerebrovasculosa — in anencephaly the cerebral hemispheres are replaced by a sheet of tissue composed largely of blood vessels called the area cerebrovasculosa.
  • a. cribrosa — that part of the renal crest or renal papilla at which the papillary ducts open into the pelvis.
  • germinal a., a. germinativa — embryonic disk.
  • a. medullovasculosa — the central part of a spinal meningomyelocele. It is a raised, reddish protuberance devoid of skin and consists of spinal cord with a surrounding vascular network.
  • motor a. — that area of the cerebral cortex which, on brief electrical stimulation, shows the lowest threshold and shortest latency for the production of muscle movement.
  • a. nuda — an area on the surface of a viscus that has no serosal covering.
  • olfactory a. — 1. the part of the piriform lobe of the brain associated with olfaction.
  • — 2. a more general area including the olfactory bulb, tract and trigone.
  • a. opaca — the opaque area of the embryonic disk of the fertilized avian egg surrounding the area pellucida; it forms some extraembryonic structures.
  • a. pellucida — the clear central part of the developing embryonic disk in a fertilized avian egg. Produces the embryo's tissues.
  • a. piriformis temporalis — the cortical area of the piriform lobe of the brain.
  • primary a. — areas of the cerebral cortex comprising the motor and sensory regions.
  • psychomotor a. — motor area.
  • a. sampling — see area sampling.
  • silent a. — an area of the brain in which pathological conditions may occur without producing clinical signs.
  • vocal a. — the part of the glottis between the vocal cords.
Word Tutor: area
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pronunciation

IN BRIEF: The amount or size of a surface or place.

pronunciation The area was only about one hundred square feet.

Tutor's tip: A soprano may sing an "aria" (operatic solo) in an outdoor "area" (extent of space) in the summertime.

Translations: Area
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Dansk (Danish)
n. - område, areal, fladeindhold, distrikt

idioms:

  • area code    områdenummer
  • built-up area    bebygget område

Nederlands (Dutch)
gebied, oppervlak, ruimte, reikwijdte (b.v. van studie), keldergat, strafschopgebied, ,

Français (French)
n. - région, zone, aire, secteur, superficie, (Mil, Pol) territoire, (fig) domaine, champ, (GB) courette en contrebas, coin (salle à manger, etc)

idioms:

  • area code    (GB) code postal, (US, Télécom) indicatif de zone

Deutsch (German)
n. - Gegend, Gebiet, Bereich, Areal

idioms:

  • area code    Vorwahl, Ortsnetzkennzahl

Ελληνική (Greek)
n. - περιοχή, έκταση, επιφάνεια, εμβαδόν, σφαίρα, τομέας

idioms:

  • area code    ταχυδρομικός κωδικός
  • built-up area    πυκνοχτισμένη περιοχή

Italiano (Italian)
regione, campo, zona, area

idioms:

  • area code    prefisso
  • built-up area    zona urbana
  • text area    formato scritto
  • type area    formato scritto

Português (Portuguese)
n. - área (f), superfície (f), território (m), recinto (m)

idioms:

  • area code    código (m) de área
  • built-up area    área construída
  • disaster area    área (f) de desastre
  • penalty area    área (f) de penalidade
  • text area    área (f) de texto
  • type area    área (f) tipo

Русский (Russian)
территория, участок, район, область, площадь

idioms:

  • area code    телефонный код страны, штата и пр.
  • built-up area    место, развивающееся быстрыми темпами
  • disaster area    район бедствия
  • penalty area    штрафная площадка
  • text area    место, отведенное для текста
  • type area    полоса набора; площадь набора

Español (Spanish)
n. - área, zona, región, terreno, campo, distrito, extensión

idioms:

  • area code    prefijo telefónico

Svenska (Swedish)
n. - yta, område

中文(简体)(Chinese (Simplified))
区域, 面积, 范围

idioms:

  • area code    区域号码
  • built-up area    建筑物多的地区, 高楼林立的地区

中文(繁體)(Chinese (Traditional))
n. - 區域, 面積, 範圍

idioms:

  • area code    區域號碼
  • built-up area    建築物多的地區, 高樓林立的地區

한국어 (Korean)
n. - 지역, 범위, 면적

日本語 (Japanese)
n. - 地域, 地方, 中庭, 面積, 範囲, 分野, 場, 場所, 地下勝手口

idioms:

  • area code    市外局番
  • built-up area    市街地
  • no go area    進入不可地帯
  • staging area    部隊集結地

العربيه (Arabic)
‏(الاسم) مساحه, منطقه, نطاق, مجال, ساحه البيت‏

עברית (Hebrew)
n. - ‮שטח, איזור, תחום של פעילות או מחקר, חצר ממנה יורדים למרתף‬


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Some good "area" pages on the web:


Math
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