twinnote
nounUK /ˈtwɪn.nəʊt/
US /ˈtwɪn.noʊt/
A twinnote is a note that comes in a pair with another note.
She wrote a twinnote to her best friend so they could each keep one.
OTHER MEANINGS
2. A musical note played at the same time as another note.
The pianist struck a twinnote to make the chord sound full.
3. A short message sent to two people at once.
He sent a twinnote to his mom and dad about the school play.
4. One of two identical pages in a notebook.
The twinnote pages had the same drawing on both sides.