Lexeme: proprietary credit card account number last 4 digit  
Inferred
Definition:
  1. noun. A proprietary credit card account number is a unique numerical code that is assigned to an individual credit card account. The last four digits of a proprietary credit card account number refer to the final four numbers of this code. These four digits are often used as a security measure to verify the identity of the cardholder without revealing the full credit card number. GPT3.5
Word Forms:
  • noun. proprietary credit card account number last 4 digit (singular), proprietary credit card account number last 4 digits (plural)
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