AskDefine | Define quadrat

User Contributed Dictionary



  1. a piece of type metal used for filling spaces; a quad
  2. a rectangular plot of land extensively studied for its ecology



  1. quadrat


  1. quadratic, square
quadrat kilometr = square kilometer.

Extensive Definition

A quadrat is a measured and marked rectangle, often a square, used in ecology to isolate a sample area for the purpose of measuring the abundance of different species within that area. By sampling many quadrats, biologists can create data sets for statistical analysis. The advent of the quadrat was a key development in the professionalization of ecology.


  • John E. Weaver. The Quadrat Method in Teaching Ecology (1918)
  • Jordan D. Connor. The Quadrat Method in Teaching Ecology (2007)

Synonyms, Antonyms and Related Words

acres, chattels real, demesne, domain, em, em quad, en, en quad, five-em space, four-em space, grounds, hair space, honor, justification space, justifying space, land, landed property, lands, lot, lots, manor, messuage, parcel, patent space, plat, plot, praedium, property, quad, real estate, real property, realty, slug, space, spaceband, tenements, thick space, thin space, toft
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