Definition of microevolutionary in US English:

microevolutionary

adjective

Biology
  • See microevolution

    • ‘Neo-darwinian theory posits that the genetic basis for speciation is not qualitatively different from that underlying microevolutionary change within populations.’
    • ‘Similarly, microevolutionary explanations may not provide a sufficient account of macroevolution, even if such reductionism were justifiable in principle.’
    • ‘First, genes expressed predominantly in males and the male germ line, and thus often subject to accelerated microevolutionary divergence, may be most likely to be deregulated in hybrids.’
    • ‘Thus, adaptation-oriented studies of characters have expanded from microevolutionary studies of function and fitness to include macroevolutionary studies of phylogenetic patterns.’
    • ‘To apply phylogenetic reasoning to questions about species status requires broadening of simple principles when microevolutionary processes may result in true differences among gene phylogenies.’

Pronunciation

microevolutionary

/-ˈlo͞oSHəˌnerē/