Preemergence
or pre-emergence
[pree-i-mur-juh ns] /ˌpri ɪˈmɜr dʒəns/
adjective
1.
occurring or applied before the emergence of a plant from the soil:
preemergence herbicide.
Read Also:
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adjective 1. eminent above or before others; superior; surpassing: He is preeminent in his profession.
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noun, Electronics. 1. a process of increasing the amplitude of certain frequencies relative to others in a signal in order to help them override noise, complemented by deemphasis before final reproduction of the signal being received.