mon ‧ o ‧ nu ‧ cle ‧ o ‧ sis /ˌmɒnəʊnjuːkliˈəʊsəs, ˌmɒnəʊnjuːkliˈəʊsɪs $ ˌmɑːnoʊnuːkliˈoʊ-/ BrE AmE noun [uncountable] medical
[ Date: 1900-2000 ; Origin: mono- + nucleus + -osis ]
↑ mono 1 (1)
mon ‧ o ‧ nu ‧ cle ‧ o ‧ sis /ˌmɒnəʊnjuːkliˈəʊsəs, ˌmɒnəʊnjuːkliˈəʊsɪs $ ˌmɑːnoʊnuːkliˈoʊ-/ BrE AmE noun [uncountable] medical
[ Date: 1900-2000 ; Origin: mono- + nucleus + -osis ]
↑ mono 1 (1)
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012