A small rectangular plot laid off, as in a forest, range, pasture, or cultivated field, for the study of vegetation or animals. Also called a quadrant.
To isolate for the purpose of preventing the spread of contagious diseases.
A hollow, sharp spine, made of modified hair, found on the backs of animals such as porcupines, hedgehogs, and echidnas. The hollow shaft of a feather, or a type of feather.