ˌəltrəˈsäniks, -nēks noun plural but usually singular in construction
Etymology: from ultrasonic (I) , after such pairs as English economic : economics
: the science of ultrasonic phenomena : supersonics
ˌəltrəˈsäniks, -nēks noun plural but usually singular in construction
Etymology: from ultrasonic (I) , after such pairs as English economic : economics
: the science of ultrasonic phenomena : supersonics
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012