anker
Definition of anker
-s
1 : a unit of capacity: a : an old Dutch and German liquid measure used in various countries of Europe especially for spirits and equal to about 9 to 10.5 U.S. gallons (30 to 40 liters) b : a U.S. unit equal to 10 gallons (37.85 liters) c : a unit of South Africa equal to 71⁄2 imperial gallons (34.10 liters)
2 : a cask or keg having a capacity of one anker
From the M-W Editors
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Origin and Etymology of anker
Dutch, probably from Medieval Latin ancheria, anceria
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