Octopus card

== English == === Etymology === Coined in a naming competition. Like its Chinese counterpart 八達通 / 八达通 (baat3 daat6 tung1), it references the number eight, as an octopus has eight tentacles. === Noun === Octopus card (plural Octopus cards) A contactless smart card, introduced in 1997, used as a form of payment in Hong Kong, originally for the mass transit system, but now widely used for public transport and other retail transactions. ==== Translations ====