- Ecol. a sampling plot, usually one square meter, used to study and analyze plant or animal life
Origin of quadratMiddle English variant, variety of quadrate ()
- Printing A piece of type metal lower than the raised typeface, used for filling spaces and blank lines. Also called quad2.
- Any of a group of small, usually rectangular plots of land used for sampling the occurrence of species or of archaeological artifacts.
Origin of quadratMiddle English, a square geometric instrument, rectangular area; see quadrate.
- (sciences) An area of land, marked for studying its plants, animals, soil, natural processes, etc. While originally rectangular, modern quadrats can be rectangular, circular, irregular, etc. (e.g.: Krebs, C.J., 1999. Ecological Methodology. Addison-Welsey Educational Publishing, Inc., Menlo Park, California; Wheater, C.P., Bell, J.R., Cook, P.A., 2011. Practical Field Ecology: A Project Guide. John Wiley and Sons, Chichester, West Sussex, England.)
From Latin quadrātum.