a. Chem. ? Obs. [f. L. calc(i)- in sense of CALX + -gen-us born, bearing + -OUS; cf. ALKALIGENOUS.] Producing a calx; said of those metals which with oxygen form a ‘calx.’
1854. Scoffern, in Orr’s Circ. Sc., Chem. 434. Metals, the oxides of which were termed by ancient chemists calces, and which are, therefore, known as the calcigenous metals.
c. 1865. J. Wylde, in Circ. Sc., I. 311/1. Three classes; namely, Alkaligeneous, Calcigeneous, and Metals proper.
