What ⹈ means
It identifies a service by its hymn line-up. Syrnikov’s Typicon is a church-service guide; a troparion, kontakion and oikos are forms of church hymn.
The wider Typicon-mark system is attributed to Nicon of the Black Mountain, an 11th century Byzantine liturgist. Syrnikov’s exact system appears in his 1910 guide and derives from older marks attributed to St. Gennadius around 1500. A separate Ukrainian Greek Catholic guide, using the Byzantine rite, appeared in Lwów in 1899 and uses a different set of signs.
Specialist liturgical notation in a Church Slavonic service guide.
Is ⹈ a quotation mark? No; in Syrnikov’s system it marks a service. A blank box means the font lacks the glyph.
Don't confuse it with
2Questions people ask
1Why does ⹈ show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type ⹈
⹈\2E48Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.