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aum

1

A unit of capacity used for wine from the Rhineland (Mosel, Alsatian, hock), about 40 U.S. gallons, or 150 liters, which is the same capacity it had three centuries ago. The word is an anglicized version of the German Ohm or Ahm, which see, and sometimes in English the word ohm itself is used to name this quantity.

sources

AUME; (of Renish Wine) is 40 [wine-ed.] gallons.

Worlidge, 1704.

2

At the Cape of Good Hope, 19ᵗʰ century, a unit of liquid capacity, = 9.5 wine gallons, about 36 liters.