κρᾶστις

From LSJ

φιλοσοφώτερον καὶ σπουδαιότερον ποίησις ἱστορίας ἐστίν: ἡ μὲν γὰρ ποίησις μᾶλλον τὰ καθόλου, ἡ δ' ἱστορία τὰ καθ' ἕκαστον λέγει → poetry is something more scientific and serious than history, because poetry tends to give general truths while history gives particular facts

Source

Russian (Dvoretsky)

κρᾶστις: или κράστις, εως ἡ зеленый корм, сено Arph., Arst.