RhymeZone: quadrat definitions

Definitions of quadrat:

noun: (sciences) An area of land, marked for studying its plants, animals, soil, natural processes, etc.
noun: (letterpress typography, obsolete) A quad; a blank metal block used to fill space in lines of type.
noun: (Egyptology) A virtual rectangular subdivision of a line or column of hieroglyphs within which a group of hieroglyphs is arranged.

(Definitions from Wiktionary)