What is the British term for a 64th note?

The British term for a 64th note is "hemidemisemiquaver." This term is derived from Latin and is used to describe a musical note that is played at a very fast tempo. In music notation, a 64th note is represented by a small filled-in oval with a stem and two tails attached to it. The use of this unique term reflects the British tradition of using different names for musical note durations, adding diversity and richness to their musical vocabulary.