DERIVE
late 14c., “descend from”
from Old French deriver “to flow, pour out, originate”
from Latin derivare “to lead or draw off (a stream of water) from its source”.
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DERIVATIVE in mathematics
Rate of change of a function with respect to a variable.
Way to show instantaneous rate of change.
[...] function that can be used to predict the behaviour of the original system under diverse conditions.
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DERIVATION in linguistics
The change of a word's meaning by adding/subtracting to it.