pearlbutton
nounUK /ˈpɜːlˌbʌtn/
US /ˈpɜːrlˌbʌtn/
A pearlbutton is a shiny button made from the shell of a sea animal.
She sewed a pearlbutton onto her favorite coat.
OTHER MEANINGS
2. A small round bead or ornament made from pearl or shell.
The necklace was strung with tiny pearlbuttons.
3. A button made from the shell of a pearl oyster or freshwater mussel.
The old shirt had pearlbuttons that had yellowed with age.
4. A decorative fastening resembling a pearl.
The costume was trimmed with pearlbuttons along the collar.