noun
silk velvet
Refers specifically to velvet made from silk, as opposed to synthetic or cotton velvet. The prefix 本 (hon) means 'genuine' or 'true'.
このドレスは本ビロードで仕立てられています。
This dress is made of silk velvet.
ビロード is a general term for velvet, while 本ビロード specifies genuine silk velvet.
Compound of 本 (hon, 'true/genuine') and ビロード (birōdo, 'velvet'), from Portuguese 'veludo'.