Botany. 1  a tuft of silky hairs at the end of a seed. 2  the leafy crown of a tree; cluster of leaves at the end of a stem. 3  a terminal cluster of bracts, as in the pineapple.
The flexible pads are called base-isolators, whereas the structures protected by means of these devices are called base-isolated buildings. The main feature of the base isolation technology is that it introduces flexibility in the structure.
Remember that a ferrite isolator/circulator is a MAGNETIC device, and don't mount it on a steel rack panel... you WILL detune it... use aluminum panels only, using brass screws and aluminum standoffs if you need standoffs (or use a block of wood).