nanosizedEnglishOxford Dictionary of Englishnanosized /ˈnanə(ʊ)sʌɪzd / (nanosize /ˈnanə(ʊ)sʌɪz/) ▸ adjective having dimensions of only a few nanometres: the surface of a lotus leaf is dotted with nanosized wax particles nanosize diamonds have been discovered in the Greenland ice sheet.