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
cadre. 1  basic structure or framework. 2  an operational unit, as of staff officers or other key personnel, around which an expanded organization can be built. 3  a small, unified group organized to instruct or lead a larger group; nucleus. 4  a member of a political, esp.