So, Today's Word is..Acanthus Leaf!
The official definition is a thick scalloped leaf and it has been used since classical times, the most recognisable form is on top of columns. It is also used in architectural moldings and as a decorative form on furniture, lamps, shelves, etc. I actually have a shelf with Acanthus leaves..see below.
Here is another example of the Acanthus Leaf being used on a sconce..