Quin ‧ qua ‧ ges ‧ i ‧ ma /ˌkwɪŋkwəˈdʒesəmə, ˌkwɪŋkwəˈdʒesɪmə/ BrE AmE noun [uncountable] technical
the Sunday before Lent (from Latin quinquaginta, meaning 50, since Quinquagesima is about 50 days before Easter)
Quin ‧ qua ‧ ges ‧ i ‧ ma /ˌkwɪŋkwəˈdʒesəmə, ˌkwɪŋkwəˈdʒesɪmə/ BrE AmE noun [uncountable] technical
the Sunday before Lent (from Latin quinquaginta, meaning 50, since Quinquagesima is about 50 days before Easter)
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012