A leader or president of a symposium.

A person who organizes or presides over a conference or expert meeting.

सम्मेलन का आयोजक या अध्यक्ष

English Usage: As the symposiarch, she was responsible for ensuring that all voices were heard during the panels.

Hindi Usage: अध्यक्ष के रूप में, वह यह सुनिश्चित करने के लिए ज़िम्मेदार थी कि पैनलों के दौरान सभी आवाज़ें सुनी जाएँ।