ser ‧ en ‧ dip ‧ i ‧ ty /ˌserənˈdɪpəti, ˌserənˈdɪpɪti/ BrE AmE noun [uncountable] literary
[ Date: 1700-1800 ; Origin: Serendip ancient name of Sri Lanka; because it was an ability possessed by the main characters in the old Persian story The Three Princes of Serendip ]
when interesting or valuable discoveries are made by accident ⇨ luck