ὕδριος
From LSJ
τὸ ἓν καὶ τὸ ὂν πολλαχῶς λέγεται → the term being and the term one are used in many ways, one and being have various meanings, one and being have many senses
English (LSJ)
α, ον,
A of water, περὶ ὑδρίων ὡροσκοπείων On water-clocks, a lost treatise by Hero, mentioned by Hero Spir.1 Prooem., and by Procl.Hyp.4.73.