Jussieu, Antoine Laurent de Syllabification: (Jus·sieu, Antoine Laurent de)Pronunciation: /jo͝oˈSHo͝o/Definition of Jussieu, Antoine Laurent de (1748–1836), French botanist. He developed the system on which modern plant classification is based. Jussieu, Antoine Laurent de in other Oxford dictionaries Definition of Jussieu, Antoine Laurent de in the British & World English dictionary