define udo
Definition of UDO. : a stout Japanese herb (Aralia cordata) the blanched young shoots of which are used especially as a vegetable and in salads. ADVERTISEMENT. Japanese.ote that some information is displayed differently in the Unabridged. To access the complete Unabridged Dictionary, with an additional 300,000 words that aren't in our free dictionary, start a free trial.
Overview [edit]. An Ultra Density Optical disc or UDO is a 133.35 mm (5.25) ISO cartridge optical disc which can store up to 30 GB of data.The second generation UDO2 media was introduced in April 2007 and has a capacity of up to 60 GBs.verview [edit]. An Ultra Density Optical disc or UDO is a 133.35 mm (5.25) ISO cartridge optical disc which can store up to 30 GB of data.