- A piece of type metal lower than the raised typeface, used for filling spaces and blank lines.
- Any of a group of small, usually rectangular plots of land used for sampling the occurrence of species or of archaeological artifacts.
- See <internalXref urlencoded="quadrate">quadrate</internalXref>.
- In <em>printing</em>, 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 <internalXref urlencoded="quad">quad</internalXref>.
- The <em>low</em> quadrat, for letterpress work, is about three fourths of an inch high: the <em>high</em> quadrat, for stereotype work, is about ten twelfths of an inch high.
- An instrument furnished with sights, a plummet, and an index, and used for measuring altitudes, but superseded by more perfect instruments in modern use.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 <internalXref urlencoded="geometrical%20square">geometrical square</internalXref>, and <em>line of shadows.</em>
- A series or set of four.
- In <em>experimental agriculture</em>, a square area of convenient size laid off for the purpose of accurate planting.
- In <em>phytogeography</em>, a similar square laid off for close study of the relative abundance of species or of other questions.
- A block of type metal lower than the letters, -- used in spacing and in blank lines.
- An old instrument used for taking altitudes; -- called also <altname>geometrical square</altname>, and <altname>line of shadows</altname>.
- A <xref>quad</xref>; a blank metal block used to fill <xref>space</xref> in lines of <xref>type</xref>.
- A <xref>rectangular</xref> area of <xref>land</xref>, marked for <xref>studying</xref> its plants, animals, soil, natural processes, etc.