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
-ον, Α
αυτός που βρίσκεται κάτω από το κεφάλι κάποιου.
[ΕΤΥΜΟΛ. < ὑπ(ο)- + -κρηνος (< κρᾶνον, βλ. λ. κρανίο)].