LEARNit Dictionary
mother-of-pearl
noun
/ˌmʌðər əv ˈpɜːl/
UK
/ˌmʌðər əv ˈpɜːrl/
US
1
the hard smooth shiny substance in various colours that forms a layer inside the shells of some types of shellfish and is used in making buttons and for decoration
صدف مرواریدی