Mikimoto pearl
/ˌmɪkiˌməʊtəʊ ˈpəːl/noun
A trademark for: a pearl cultured by means of a technique developed by Mikimoto.
Origin
1950s. From the name of Kōkichi Mikimoto, Japanese pearl farmer who, between 1890 and 1913, developed a method of producing spherical cultured pearls + pearl, originally in the names of companies involved in this work, after Japanese Mikimoto shinju.