semiperimeter

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noun

Half of the perimeter (sum of the lengths of the sides) of a polygon. The term is typically applied to triangles, cyclic quadrilaterals, and regular polygons.

OriginEnglish perimeter ← Latin sēmi- ← Proto-Indo-European *sēmi →
Scrabble 19
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Meanings

nounsemiperimeter (plural semiperimeters)

plural semiperimeters

  1. mathematicsHalf of the perimeter (sum of the lengths of the sides) of a polygon. The term is typically applied to triangles, cyclic quadrilaterals, and regular polygons.

Origin

  1. Proto-Indo-European*sem-
  2. Proto-Indo-European*sēmi
  3. Latinsēmi-
  4. Englishsemi-
  5. Englishperimeter
  6. Englishsemiperimeter

From semi- + perimeter.

Full word history & related roots →
Cite this entry
APA

semiperimeter. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/semiperimeter

MLA

“semiperimeter.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/semiperimeter. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “semiperimeter,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/semiperimeter.

Source: semiperimeter on Wiktionary, CC BY-SA 4.0.