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  2. Semantic change - Wikipedia

    en.wikipedia.org/wiki/Semantic_change

    Cohyponymic transfer: Horizontal shift in a taxonomy, e.g., the confusion of mouse and rat in some dialects. Antiphrasis: Change based on a contrastive aspect of the concepts, e.g., perfect lady in the sense of "prostitute". Auto-antonymy: Change of a word's sense and concept to the complementary opposite, e.g., bad in the slang sense of "good".

  3. Opposite - Wikipedia

    en.wikipedia.org/wiki/Opposite

    Complementary antonyms are word pairs whose meanings are opposite but whose meanings do not lie on a continuous spectrum (push, pull). Relational antonyms are word pairs where opposite makes sense only in the context of the relationship between the two meanings (teacher, pupil). These more restricted meanings may not apply in all scholarly ...

  4. Adiabatic process - Wikipedia

    en.wikipedia.org/wiki/Adiabatic_process

    A process without transfer of heat to or from a system, ... The Greek word ἀδιάβατος is formed from privative ... An adiabatic process is the opposite – a ...

  5. Converse (semantics) - Wikipedia

    en.wikipedia.org/wiki/Converse_(semantics)

    Converses can be understood as a pair of words where one word implies a relationship between two objects, while the other implies the existence of the same relationship when the objects are reversed. [3] Converses are sometimes referred to as complementary antonyms because an "either/or" relationship is present between them. One exists only ...

  6. Newton's law of cooling - Wikipedia

    en.wikipedia.org/wiki/Newton's_law_of_cooling

    The opposite is also true: A Biot number greater than 0.1 (a "thermally thick" substance) indicates that one cannot make this assumption, and more complicated heat transfer equations for "transient heat conduction" will be required to describe the time-varying and non-spatially-uniform temperature field within the material body.

  7. Population transfer - Wikipedia

    en.wikipedia.org/wiki/Population_transfer

    Population exchange is the transfer of two populations in opposite directions at about the same time. In theory at least, the exchange is non-forcible, but the reality of the effects of these exchanges has always been unequal, and at least one half of the so-called "exchange" has usually been forced by the stronger or richer participant.

  8. Negative energy - Wikipedia

    en.wikipedia.org/wiki/Negative_energy

    In quantum theory, the uncertainty principle allows the vacuum of space to be filled with virtual particle-antiparticle pairs which appear spontaneously and exist for only a short time before, typically, annihilating themselves again.

  9. Hohmann transfer orbit - Wikipedia

    en.wikipedia.org/wiki/Hohmann_transfer_orbit

    Due to the reversibility of orbits, a similar Hohmann transfer orbit can be used to bring a spacecraft from a higher orbit into a lower one; in this case, the spacecraft's engine is fired in the opposite direction to its current path, slowing the spacecraft and lowering the periapsis of the elliptical transfer orbit to the altitude of the lower ...