ylang-ylang Syllabification: (y·lang-y·lang)Pronunciation: /ˌēläNG ˈēläNG/ (also ilang-ilang)Definition of ylang-ylang noun 1a sweet-scented essential oil obtained from the flowers of a tropical tree, used in perfumery and aromatherapy. 2the yellow-flowered tree, native to the Malay peninsula and the Philippines, from which this oil is obtained. Cananga odorata, family Annonaceae Origin: late 19th century: from Tagalog ilang-ilangylang-ylang in other Oxford dictionaries Definition of ylang-ylang in the British & World English dictionary