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binary-coded decimal system

American  
[bahy-nuh-ree-koh-did, -ner-ee-] / ˈbaɪ nə riˌkoʊ dɪd, -nɛr i- /

noun

  1. a numerical system in which each decimal digit is represented by a unique collection of binary digits, not necessarily the same as those used in binary notation. BCD