derivative
[derivatif,i:v]
Derivative
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abstract:
In chemistry, a derivative is a compound that is [from a similar compound by some chemical or physical process. In the past it was also used to mean a compound that can be imagined to arise from another compound, if one atom is replaced with another atom or group of atoms, but modern chemical language now uses the term structural analogue] for this meaning - thus eliminating ambiguity of both terms.
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