dicalcicadj.

/dʌɪˈkalsɪk/Etymology: < di- comb. form 2 + calcic adj.
Chemistry.
1872 H. Watts (ed. 2) I. 719 The product is a brown mass consisting..of dicalcic phosphide and calcic pyrophosphate.
1884 F. J. Lloyd
This entry has not yet been fully updated (first published 1895; most recently modified version published online June 2018).