randoseru UK /ˈɹæn.də(ʊ)ˌsɛ.ɹuː/US /ˈɹɑn.doʊˌsɛ.ɹu/ noun1 •A type of backpack worn by Japanese elementary schoolchildren, made of leather or leatherette."The randoseru is an indispensable object in Japan which gives poetic charm to spring,” I explained to Leigh Hollywood, but I don't think he understood. — 1992