nemesia Syllabification: (ne·me·sia)Pronunciation: /nəˈmēZHə/Definition of nemesia noun a plant related to the snapdragon that is cultivated for its colorful, obliquely funnel-shaped flowers. Genus Nemesia, family Scrophulariaceae: several species, in particular N. strumosa and its hybrids Origin:modern Latin, from Greek nemesion, denoting various similar plantsnemesia in other Oxford dictionaries Definition of nemesia in the British & World English dictionary