subzonal

About 0.01 uses per million words.

Meaning

1. adjective Relating to a subzone.
2. adjective Situated under a zone, or zona; applied to a membrane between the zona radiata and the umbilical vesicle in the mammal embryo.

Similar words

insemination superzonal subdivisional subterritorial subdialectal subsegmental subprovincial microzonal subsectoral subdistributional

Often followed by

membrane insemination sperm layer insertion injection