Acetabulum (unit)
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In Ancient Roman measurement, the acetabulum was a measure of volume (fluid and dry) equivalent to the Greek (''oxybaphon''). It was one-fourth of the
hemina The ancient Roman units of measurement were primarily founded on the ancient Greek units of measurement, Hellenic system, which in turn was influenced by the ancient Egyptian units of measurement, Egyptian system and the Ancient Mesopotamian unit ...
and therefore one-eighth of the
sextarius The ancient Roman units of measurement were primarily founded on the Hellenic system, which in turn was influenced by the Egyptian system and the Mesopotamian system. The Roman units were comparatively consistent and well documented. Length T ...
. It contained the weight in water of fifteen Attic
drachma The drachma ( el, δραχμή , ; pl. ''drachmae'' or ''drachmas'') was the currency used in Greece during several periods in its history: # An ancient Greek currency unit issued by many Greek city states during a period of ten centuries, fro ...
e. Used with some frequency by
Pliny the Elder Gaius Plinius Secundus (AD 23/2479), called Pliny the Elder (), was a Roman author, naturalist and natural philosopher, and naval and army commander of the early Roman Empire, and a friend of the emperor Vespasian. He wrote the encyclopedic '' ...
, in a 1952 translation the unit was judged to be equivalent to . However, other sources estimate a higher value of perhaps (see
Ancient Roman units of measurement The ancient Roman units of measurement were primarily founded on the Hellenic system, which in turn was influenced by the Egyptian system and the Mesopotamian system. The Roman units were comparatively consistent and well documented. Length T ...
).


References

* Units of volume Ancient Roman units of measurement {{measurement-stub