θυγατριδέος
From LSJ
τούτων γάρ ἑκάτερον κοινῷ ὀνόματι προσαγορεύεται ζῷον, καί ὁ λόγος δέ τῆς οὐσίας ὁ αὐτός → and these are univocally so named, inasmuch as not only the name, but also the definition, is the same in both cases (Aristotle, Categoriae 1a8-10)
French (Bailly abrégé)
-οῦς, έου-οῦ (ὁ) :
fils de la fille, petit-fils.
Étymologie: θυγάτηρ.
Russian (Dvoretsky)
θῠγατρῐδέος: стяж. θῠγατρῐδοῦς ὁ сын дочери, внук (по женской линии) Her., Isae., Arst.