Definition of subzonal in US English:

subzonal

adjective

  • 1Embryology. Located or occurring beneath the zona pellucida of an ovum.

  • 2Chiefly Palaeontology and Ecology. Of or relating to a subzone.

Origin

Late 19th century; earliest use found in The Lancet. From sub- + zonal.

Pronunciation

subzonal

/ˌsʌbˈzəʊnl/