Function: noun plural but singular in construction
Date: 1916
: a branch of physics in which the principles of optics are applied to beams of electrons
– elec · tron-op · ti · cal \ i- ˌ lek- ˌ trän- ' äp-ti-k ə l \ adjective
Function: noun plural but singular in construction
Date: 1916
: a branch of physics in which the principles of optics are applied to beams of electrons
– elec · tron-op · ti · cal \ i- ˌ lek- ˌ trän- ' äp-ti-k ə l \ adjective
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012