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Noun: keychain  'kee,cheyn
  1. [N. Amer] A circular ring of metal for holding keys
    "He attached his new house key to his keychain";
    - key ring
     
  2. A digital repository for cryptographic keys
    "He stored his encryption keys in a secure keychain";
    - keyring, key ring

Derived forms: keychains

Type of: hoop, ring

Encyclopedia: Keychain