The metre, kilogram, second and ampere are called fundamental units or base units. From these units we can derive some more units that are called derived units. These units are built up step by step from the base units and usually given a distinct name.
cadre [(kad-ree, kah-dray)] An elite or select group that forms the core of an organization and is capable of training new members. The New Dictionary of Cultural Literacy, Third Edition
Lustres are mantel decorations or pedestal vases with many hanging glass prisms. The name really refers to the prisms, and it is proper to refer to a single glass prism as a lustre. Luster is an iridescent glaze in this list. (Lustres | Furniture, Clocks & Lighting Price Guide) eBay Auctions.