- discharge lamp
Origin of discernible
Examples from the Web for undiscernable
And some of those energies are weak and obscure, others hid or undiscernable, othersome greater and of a larger projection.Democritus Platonissans|Henry More
also discernable, 1560s, from French discernable, from discerner (see discern). Form with -a- was more common at first; spelling changed to -i- 17c. to conform to Latin discernibilis.