diaschisma
noun
di·a·schis·ma
ˌdīəˈskizmə
plural -s
1
: one of several minute intervals in ancient Greek music
2
: a small musical interval (such as that between C and D double flat in pure intonation) that together with the schisma comprises the syntonic comma
Word History
Etymology
New Latin, from Greek diaschisma, from diaschizein to sever