Definition of calc- in English:

calc-

combining form

(Used chiefly in geological terms) of lime or calcium: calcalkaline

Origin

from German Kalk 'lime', with spelling influenced by Latin calx 'lime' (see calx).

Definition of calc- in:

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Word of the day demoralize
Pronunciation: dɪˈmɒrəlʌɪz
verb
cause (someone) to lose confidence or hope