A traditional unit of volume in Spain and Portugal. The two countries used the name for units of quite different sizes. The Spanish almude is comparable to the British gallon; it holds about 4.625 liters, equivalent to 1.017 Imperial gallon or 1.222 U.S. liquid gallon. The Portuguese almude is much larger; it holds about 16.7 liters, which is 3.67 Imperial gallons or 4.41 U.S. liquid gallons