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\ ˈlȯg-, ˈläg- 
\
\Medical Definition of log phase
: the period of growth of a population of cells (as of a microorganism) in a culture medium during which numbers increase exponentially and which is represented by a part of the growth curve that is a straight line segment if the logarithm of numbers is plotted against time
— called also logarithmic phase
— compare lag phaseComments on log phase
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