pediment, window pediment, crosshead pediment
Sometimes these are called the "representative" elements.
Colorforms
The decorative top of a column is called the capital.
The decorative curl on the end of a violin is called the scroll.
The decorative wood on a staircase is called "wainscot"
"Decorative" when describing fruit trees, means no fruit. It is called a decorative Red Plum tree.
A decorative garland of flowers is a lei.
The Periodic Table of the Elements, sometimes called just the Periodic Table, is the document in which elements are organized by their properties. It was created in 1869.
It is called an etui
The decorative top of a column is called the capital.
bcz they are what matter is built from
A decorative piece of needlework is typically called an embroidery. This can include a variety of stitching techniques on fabric to create decorative designs or patterns.