LSJ
ίδων, αἱ, trousers worn by eastern nations, Hdt. 5.49, 7.61, X. An. 1.5.8; by the Scythians, Hdt. 1.71, cf. Hp. Aër. 22; by the Sacae, Hdt. 3.87, etc. ; sg., Luc. Hist. Conscr. 19, Philostr. VA 1.25. sg. ἀναξυρίς, ἡ, = ὀξαλίς, Dsc. 2.114, Sch. Nic. Th. 838. (Derived from ἀνασύρεσθαι by Eust. 22.8, but really Persian. Wrongly expl. as a head-covering by Poll. 7.58.)
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
ων, αἱ (persisches Wort), die langen, weiten Beinkleider der Perser und anderer barbarischer Völker, braccae, Her. u. Xen. öfter. S. Perizon. ad Ael. V.H. 12.32. Vgl. θύλακος.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)