diesis

/ˈdaɪ.ə.sɪs/

Etymology

From Ancient Greek δίεσις (díesis, “sending through, the smallest interval in the scale”).

diesis means any of several intervals, smaller than a tone, in ancient Greek music. Lexicurio rates it Sui generis — a strength score of 90 out of 100.

diesis is pronounced /ˈdaɪ.ə.sɪs/.

noun

Any of several intervals, smaller than a tone, in ancient Greek music.
The double dagger sign (‡).