(logic circuits) A Boolean operation that is real if the two input variables are diverse but is usually Wrong; the XOR operation ( A B ¯ + A ¯ B displaystyle scriptstyle A overline B + overline A B dermal ectodermal endodermal epidermal epithermal geothermal hydrothermal intradermal isothermal mesodermal photothermal electrothermal See All Rhymes