differentiabilityn.
/ˌdɪf(ə)rɛnʃəˈbɪlᵻti/, U.S. /ˌdɪfəˌrɛn(t)ʃ(i)əˈbɪlədi/ Mathematics.
The quality of being differentiable (differentiable adj. 1).
ΘΚΠ
the world > relative properties > kind or sort > individual character or quality > [noun] > individuality or distinctness > making separate or distinct > ability to be
discriminability1877
differentiability1893
1893 Proc. Edinb. Math. Soc. 1892–3 11 166 There are some points in connection with the Fourier series which I have not touched upon, and in particular the differentiability of the series.
1925 G. A. Bliss Calculus of Variations v. 144 Hilbert's differentiability condition.
1947 Mind 56 48 The f's must be single-valued, but no restrictions of continuity or differentiability are implied.
2004 R. Cooke tr. V. A. Zorich Math. Anal. I. v. 179 Thus, differentiability of a function at a point is equivalent to the existence of its derivative at the same point.
This entry has been updated (OED Third Edition, March 2016; most recently modified version published online March 2022).
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n.1893