1. A new style of notation in music, which, dispensing with the staff, its lines and spaces, indicates the notes by letters, and time and accent by dashes and colons.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• ronic sol-fa,
• fonic sol-fa,
• gonic sol-fa,
• yonic sol-fa,
• 6onic sol-fa,
• 5onic sol-fa,
• tinic sol-fa,
• tknic sol-fa,
• tlnic sol-fa,
• tpnic sol-fa,
• t0nic sol-fa,
• t9nic sol-fa,
• tobic sol-fa,
• tomic sol-fa,
• tojic sol-fa,
• tohic sol-fa,
• tonuc sol-fa,
• tonjc sol-fa,
• tonkc sol-fa,
• tonoc sol-fa

The adjective form of the word "Tonic sol-fa" is "tonic-sol-faic".

The plural form of the word "Tonic sol-fa" is "Tonic sol-fas".

The singular form of the word "Tonic sol-fa" is "Tonic sol-fa". The term is already singular and does not change in its singular form.