Definition of amplification
1a
: an act, example, or product of amplifying
b
: a usually massive replication of genetic material and especially of a gene or DNA sequence (as in a polymerase chain reaction)
2a
: the particulars by which a statement is expanded
b
: an expanded statement
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Merriam-Webster unabridged
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Time Traveler for amplification
The first known use of amplification was in 1546
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