su ‧ per ‧ con ‧ duc ‧ tiv ‧ i ‧ ty /ˌsuːpəkɒndəkˈtɪvəti, ˌsuːpəkɒndəkˈtɪvɪti $ -pərkɑːn-/ BrE AmE noun [uncountable]
the ability of some substances to allow electricity to flow through them very easily, especially at very low temperatures
su ‧ per ‧ con ‧ duc ‧ tiv ‧ i ‧ ty /ˌsuːpəkɒndəkˈtɪvəti, ˌsuːpəkɒndəkˈtɪvɪti $ -pərkɑːn-/ BrE AmE noun [uncountable]
the ability of some substances to allow electricity to flow through them very easily, especially at very low temperatures
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012