Reaktiivne

Reaktiivne is an Estonian adjective meaning reactive or prone to respond to stimuli. In general usage it describes systems, materials, or organisms that respond to inputs or environmental changes. The word is used across several disciplines to signal a tendency toward reaction rather than active consumption of energy or effort.

In chemistry and materials science, a reactive substance readily engages in chemical reactions with other substances. Reactivity depends on factors such as temperature, pressure, concentration, and the presence of catalysts. Reactive hazards are a concern in handling chemicals, requiring appropriate safety measures.

In electrical engineering, the term is connected to reactive power, the portion of electrical power that oscillates between source and load due to energy storage in inductors and capacitors. Reactive power does not perform net work but affects voltage, current, and overall power quality.

In computing and software development, reactive programming (reaktiivne programmeerimine) is a paradigm that emphasizes asynchronous data streams and the propagation of change. It enables systems to respond promptly to events, often using libraries and frameworks such as RxJava or RxJS.

In biology and physiology, reaktiivne can describe organisms or cells that adjust their behavior or metabolism in response to stimuli, as part of adaptive or reflexive processes. The term helps distinguish immediate responses from longer-term adaptations.