περικάρπιον
From LSJ
προγράψαντες οὖν τά τε θεωρήματα καὶ τὰ ἐπιτάγματα τὰ χρεῖαν ἔχοντα εἰς τὰς ἀποδείξιας αὐτῶν μετὰ ταῦτα γραψοῦμές τοι τὰ προκείμενα → having therefore written at the beginning the theorems and the postulates that are necessary for their proofs, we will then write out for you the propositions
English (LSJ)
τό,
A case of fruit or seed, pod, husk, or shell, Arist. de An.412b2, Mete.380a11, GA770a15, Pr.925b30, Thphr.HP1.2.1,al., Phan.Hist.34, Dsc.2.110. II bracelet, Poll.5.99, Malch.p.423 D.
German (Pape)
[Seite 578] τό, das, was die Frucht od. den Samen umgiebt, Samenkapsel, Schale der Frucht; Arist. meteor. 4, 3; probl. 20, 25; τῶν ῥοιῶν, Alciphr. 3, 60; a. Sp. – Auch = Armband. Poll.