What does "marmalade" mean?

Marmalade: A preserve or confection made of the pulp of fruit, as the quince, pear, apple, orange, etc., boiled with sugar, and brought to a jamlike consistence. Marmalade tree (Bot.), a sapotaceous tree (Lucuma mammosa) of the West Indies and Tropical America. It has large obovate leaves and an egg-shaped fruit from three to five inches long, containing a pleasant-flavored pulp and a single large seed. The fruit is called marmalade, or natural marmalade, from its consistency and flavor.