Left Half Circle with Dot

It marks a simple service in a church service book.

A typicon is a guide to which services a church holds and how they fit into the year. Dolnitsky’s Ukrainian Greek Catholic book follows the Byzantine rite, a form of Christian worship also used by Eastern Orthodox churches.

The service-guide tradition in Ukraine is older than Dolnitsky’s volume: Ukrainian editors trace it through Studite and Jerusalem monastic rules. This specific one-dot form is part of the notation in his book.

Is 🤆 an emoji?

No; it is a liturgical text symbol, not an emoji.

A font draws its shape, and Unicode does not define separate emoji artwork for it. If it looks plain or unfamiliar, read it as a church-book mark rather than as a mood or reaction.