calathea Syllabification: (cal·a·the·a)Pronunciation: /ˌkaləˈTHēə/Definition of calathea noun a tropical American plant that typically has variegated and ornamental leaves, widely grown as a greenhouse or indoor plant. Genus Calathea, family Marantaceae: many species Origin:modern Latin, from Greek kalathos 'basket'calathea in other Oxford dictionaries Definition of calathea in the British & World English dictionary