A preserve made of the pulp and rind of citrus fruits WordNet 3.0 & Open English WordNet

Marmalade is a fruit preserve made from the juice and peel of citrus fruits boiled with sugar and water. Wikipedia

Sweet conserve made with fruit. Wikipedia Disambiguation

Preserve made from the juice and peel of citrus fruits Wikidata

A sweet, gelatinous substance (made from fruit juice, sugar and pectin) that is commonly spread on bread and toast. OmegaWiki

Citrus fruit variant of jam but distinguished by being made slightly bitter by the addition of the peel and by partial caramelisation during manufacture. Most commonly made with Seville oranges, and usually qualified by the name of the fruit when made with other types of fruit. Wiktionary

Jam. Wiktionary (translation)