nonce-wd., a rendering of mod.L. tantitās, ‘the fact of being or having so much,’ f. L. tāntus so much.
[Attributed in some recent dictionaries (from Annandale’s Ogilvie, 1882, onward) to James Mill, who used only the Latin (Elem. Human Mind, 1829, II. xiv. § 2, 50) ‘Quantitas, if it was kept to its original meaning, would still connote tantitas; just as paternity connotes filiality.’]
