⑨

Design
Circled digit.

Symbol

 * 1)  The asteroid 9 Metis.
 * 2)  The ninth (white or black) stone played in a position.

Usage notes

 * See ①

Synonyms

 * [[file:Metis symbol (fixed width).svg|20px]]

Symbol

 * 1) The number 9 enclosed in a circle, used in enumerating lists.

Etymology 2
A diagram of gameplay in the manual of  labelled Cirno with the legend "" and the key "9. Idiot".

Noun

 * 1)   The  character, known affectionately as an idiot.