#physics noun

• Anisostasy — A state of isostatic imbalance or structural instability within the Earth's crust, characterized by unequal or asymmetrical compensation of mountain masses and tectonic blocks in the upper mantle. This geophysical phenomenon causes severe local gravimetric anomalies and drives vertical compensatory movements of the crust, often generating orogenic seismic activity.
• Anisotropy — The property of certain substances (especially crystals) or physical media to present different mechanical, optical, thermal, or electrical characteristics in different directions. This structural phenomenon results from the non-uniform arrangement of atoms or molecules in space, representing the opposite of isotropy and forming the basis for the operation of many advanced optical and electronic devices.
• 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.