perimeter [puh-rim-i-ter] Word Origin noun

  1. the border or outer boundary of a two-dimensional figure.
  2. the length of such a boundary.
  3. a line bounding or marking off an area.
  4. the outermost limits.
  5. Military. a fortified boundary that protects a troop position.
  6. Ophthalmology. an instrument for determining the peripheral field of vision.

Origin of perimeter 1585–95; French périmètre Latin perimetros (feminine) Greek perímetron (neuter). See peri-, -meter Related formspe·rim·e·ter·less, adjectivepe·rim·e·tral, per·i·met·ric [per-uh-me-trik] /ˌpɛr əˈmɛ trɪk/, per·i·met·ri·cal, adjectiveper·i·met·ri·cal·ly, adverbpe·rim·e·try, nounCan be confusedparameter perimeter British Dictionary definitions for perimetral perimeter noun

  1. maths
    1. the curve or line enclosing a plane area
    2. the length of this curve or line
    1. any boundary around something, such as a field
    2. (as modifier)a perimeter fence; a perimeter patrol
  2. a medical instrument for measuring the limits of the field of vision

Derived Formsperimetric (ˌpɛrɪˈmɛtrɪk) or perimetrical, adjectiveperimetrically, adverbperimetry, nounWord Origin for perimeter C16: from French périmètre, from Latin perimetros; see peri-, -meter Word Origin and History for perimetral perimeter n.

early 15c., “line around a figure or surface,” from Latin perimetros, from Greek perimetron “circumference,” from peri- “around” (see peri-) + metron “measure” (see meter (n.2)). Military sense of “boundary of a defended position” is attested from 1943.

perimetral in Medicine perimeter [pə-rĭm′ĭ-tər] n.

  1. The outer limits of an area; circumference.
  2. An instrument used to measure field of vision.

perimetral in Science perimeter [pə-rĭm′ĭ-tər]

  1. The sum of the lengths of the segments that form the sides of a polygon.
  2. The total length of any closed curve, such as the circumference of a circle.

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