Small square block used as a space in printing
Small square area or block, especially used as space in printing (abbr. quad).
In environmental studies, a square structure used to study the distribution of plants in a particular place, for instance a field, rocky shore, or mountainside. The size varies, but is usually 0.5 or 1 meter square, small enough to be carried easily. The quadrat is placed on the ground and the abundance of species estimated. By making such measurements a reliable understanding of species distribution is obtained.
Četvorougaonik sa jednakim stranama i uglovima; kvadratni metar, površina od 1m dužine i 1m širine; alg. drugi stepen (druga potencija). (lat.)