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καμπτικόν

From LSJ

Μία χελιδὼν ἔαρ οὐ ποιεῖ → One swallow does not a summer make

Aristotle, Nicomachean Ethics, 1098a18

Russian (Dvoretsky)

καμπτικόν: τό сгиб, сочленение (δακτύλου Arst.).