Depolarisations

Part of speech: noun, verb

Definitions

1. An event or process that reduces the polarization in materials or electromagnetic fields
2. A change in a physical substance where the oriented arrangement of charges or vectors becomes disordered
3. The act of returning a system from a polarized state to a more neutral or uncharged state

Etymology: "Depolarisations" is simply the plural of "depolarisation", so its history is that of the noun it pluralises. That noun is built from "depolarise", which combines the prefix "de-", meaning "reversal or removal", with "polarise", the verb for giving something a polarity or directional orientation. "Polarise" itself traces back to "polar", from the Latin "polaris", relating to the poles of the sky and the Earth, with the Greek "polos" as its ultimate source. The process sense is what matters here: "depolarisation" names the act or result of undoing that orientation, whether a cell membrane losing its electrical charge difference, a battery electrode losing its charge, or light losing its directional alignment. Each usage in the plural counts a separate instance of that reversal.