#astatic

• Anastatic — Relating to anastasis or obtained through anastatic processes; describing an archaic method of printing or faithfully reproducing texts and engraved drawings by chemically transferring ink from an old document onto a relief metal plate, without requiring resetting. Extended or figuratively, the term may describe a process of revival, complete restoration, or bringing back a damaged graphic support to its initial state.
• Anastatica — A monotypic genus of herbaceous xerophytic plants in the Brassicaceae family, with its sole representative species being 'Anastatica hierochuntica' (Rose of Jericho); it is renowned for its extreme capacity for anhydrobiosis adapted to desert climates. The plant dries up and rolls into a compact ball during droughts, unfolding and regaining its vegetal appearance upon contact with water.
• Astatic — Being in a state of neutral equilibrium, lacking a fixed position of stability, or unaffected by external directive forces such as terrestrial magnetism. In electronics and automatics, it describes a system or regulator that exhibits no steady-state error relative to the reference value, continuing to modify its parameters until the error is completely eliminated.
• Astatic (fem.) — The feminine form of the adjective 'astatic'; it characterizes a physical entity, an electrical variable, a control loop, or a casing that is in neutral equilibrium or exhibits no steady-state error; in automatics, it can refer to an astatic characteristic of a motor or relay.
• Astatization — A technical process or structural method through which an oscillating system, a measuring instrument (such as a galvanometer or seismograph), or a regulator is brought into a state of astatism; this operation cancels or minimizes the elastic or gravitational restoring force, causing the system to remain in equilibrium regardless of its position or considerably increasing the device's sensitivity to external perturbations.