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.
Some restrained spring isolators are designed to provide seismic restraint as well. Restrained Spring IsolatorsModel FRS Isolate vibration produced by equipment subject to weight change or external forces, such as air-cooled condensers, fans, and other rooftop equipment.