̷ ̷ˌ ̷ ̷ ̷ ̷ˈ ̷ ̷ ̷ ̷ noun plural but singular in construction
: a branch of physics dealing with the influence of a magnetic field upon light
̷ ̷ˌ ̷ ̷ ̷ ̷ˈ ̷ ̷ ̷ ̷ noun plural but singular in construction
: a branch of physics dealing with the influence of a magnetic field upon light
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012