Wikipedia
Ramuan is a uniquely Malaysian concept, referring to a blend of plants or plant parts which are selected and mixed to create pleasing or healthful effects in the preparation of food or the creation of herbal medicines.
Most often, the term is used to denote a holistic formulation of mixed leaves, stems, barks, fruits and roots, traditionally gathered from the rainforest. Generally ramu or ramuan is considered to have capabilities to enhance beauty, and/or to promote health. It also commonly refers to a blend of seasonings for cooking.
In traditional Malay language, ber-ramu means to collect or to look for leaves, fruits and roots for medicinal ingredients. Another commonly used term is rempah ratus (a term to denote a polyherbal preparation which requires a hundred kinds of medicinal plants and spices).
In a broader context, the term ramuan is almost interchangeable with the idea of “mixture”. However, it further encompasses the sense of ingredient harmonization; it implies a ‘ melting pot’, of unity and integration as well as the sense of ‘many held together within unity’.