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Diemath

In the East Frisian Islands, ? - 19ᵗʰ century, a unit of land area (the Ostfriesische Diemath) = 400 square Ruten, each of 144 square Prussian Fuss, about 5673.83 square meters.¹ Also called a Diemt.

A related unit is the Moordiemath, about 9974 square meters.

The word is derived from Demath, from Dagmet, the area a person can reap in one day. It is thus a work measure of land.

1. A value given, for example, in an announcement of 1871 reproduced in facsimile in
Wolfgang Hase and Gerd Dethlefs.
Damit mußsten sie rechnen...auch auf dem Lande. Zur Alltagsgeschichte des Rechnens mit Münze, Mass und Gewicht.
Cloppenburg: Museumsdorf Cloppenburg, 1994.

Page 89.