εὐνούχιον
From LSJ
ἐν δὲ τοῖς φυσικοῖς ἀεὶ οὕτως, ἂν μή τι ἐμποδίσῃ → in natural products the sequence is invariable, if there is no impediment | now with that which is natural it is always thus if there is no impediment
Greek (Liddell-Scott)
εὐνούχιον: τό, εἶδος θρίδακος, μαρουλίου, = ἀστυτὶς ἢ ἀστῦτις, Πλιν. Η. Ν. 19. 8.