adicional

adj. additional, extra; added; further; side

adj. accessory, additional; extra, more; second; collateral

= accompanying, additional, supplementary, supplemental.
Ex: A summary differs from an abstract in that it assumes that the reader will have the opportunity to peruse the accompanying text.
Ex: The note area is the part of the description where it is permitted to include any additional information which the cataloguer feels may be of value to the user.
Ex: The hierarchical relationships associated with selected index terms may be revealed by displaying related terms beneath such terms in a supplementary list in the thesaurus.
Ex: Supplemental information was gathered about each library from Bowker's American Library Directory.
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* ingrediente adicional de la pizza = pizza topping.
* tiempo adicional = extra-time.