Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Printing A piece of type metal lower than the raised typeface, used for filling spaces and blank lines. Also called quad2.
  • n. Ecology Any of a group of small, usually rectangular plots of land arranged for close study of the distribution of plants or animals in an area.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A rectangular area of land, marked for studying its plants, animals, soil, natural processes, etc.
  • n. A quad; a blank metal block used to fill space in lines of type.

from the GNU version of the Collaborative International Dictionary of English

  • n. A block of type metal lower than the letters, -- used in spacing and in blank lines.
  • n. An old instrument used for taking altitudes; -- called also geometrical square, and line of shadows.

from The Century Dictionary and Cyclopedia

  • See quadrate.
  • n. In printing, a blank type for the larger blank spaces in or at the end of printed lines, cast lower in height, so that it shall not be inked or impressed: made in four forms for all text type—en, em, two-em, three-em. Usually abbreviated to quad.
  • n. The low quadrat, for letterpress work, is about three fourths of an inch high: the high quadrat, for stereotype work, is about ten twelfths of an inch high.
  • n. An instrument furnished with sights, a plummet, and an index, and used for measuring altitudes, but superseded by more perfect instruments in modern use. Also called geometrical square, and line of shadows.
  • n. A series or set of four.
  • n. In experimental agriculture, a square area of convenient size laid off for the purpose of accurate planting.
  • n. In phytogeography, a similar square laid off for close study of the relative abundance of species or of other questions.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

Middle English, a square geometric instrument, rectangular area; see quadrate.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin quadrātum.

from Wiktionary, Creative Commons Attribution/Share-Alike License

1683. Probably from French cadrat or Italian quadrato ("square"), originally from Latin quadrātum ("square"). So called because the basic quadrat, the em quadrat, has a square face, having the same width as the height of a line of type.

Examples

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