[Meaning a] scooper, a liquid measure of [ = equivalent to] 2 ounces.[1]
Or a spoonful.
Aristophanes [writes]: "you will quickly call for a cup."[2] In order to apply it to your jaws; so badly will you get your eye blackened and be blinded by us. For they fill a cup with hot [water] and attach it to swellings by way of treatment.
So 'cup' [comes] from the [verb] xu/w ["I pour"], [hence] xu/aqos, and ku/aqos.