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Quadrat vs Undefined - What's the difference?

quadrat | undefined |

As a noun quadrat

is square.

As an adjective undefined is

lacking a definition or value.

quadrat

English

Etymology 1

From (etyl) .

Noun

(en noun)
  • (sciences) An area of land, marked for studying its plants, animals, soil, natural processes, etc. While originally rectangular, modern quadrats can be rectangular, circular, irregular, etc. (e.g.: Krebs, C.J., 1999. Ecological Methodology. Addison-Welsey Educational Publishing, Inc., Menlo Park, California; Wheater, C.P., Bell, J.R., Cook, P.A., 2011. Practical Field Ecology: A Project Guide. John Wiley and Sons, Chichester, West Sussex, England.)

    • Etymology 2

    1683. Probably from (etyl) cadrat or (etyl) . 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.

    Noun

    (en noun)
  • (metal type, obsolete) A quad; a blank metal block used to fill space in lines of type.
  • * 1683 , Joseph Moxon, Mechanick Exercises: Or, the Doctrine of Handy-Works. Applied to the art of Printing. , v 2, p 222–23:
    • If his Title'' be ?hort, he ''Sets'' it in the middle of the ''Line'', by ''Setting Quadrats''''' on both ?ides: If his ''Title'' be long, he ''Sets'' the middle ''Line'' in the middle: If it make three or more ''Lines'', he ''Indents'' the fir?t with an m '''''Quadrat''''', and the other with two m '''''Quadrats .
    Synonyms
    * quad * space
    Derived terms
    * quad ----

    undefined

    English

    Adjective

    (wikipedia undefined) (-)
  • Lacking a definition or value.
  • (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.
    • The result of division by zero is undefined .

    Antonyms

    * defined