PTS Pali-English dictionary - The Pali Text Society's Pali-English dictionary
bhallaka
Bhallaka,[lit.from the Bhalla people] a kind of copper,enumd under the eight pisāca-lohāni,or copper coming from the Piśāca country VbhA.63 (is reading correct?).It is doubtful whether we should not read mallaka,cp.malla.(Page 499)