glossary

implantation

Definition implantation

implantationl

implantation n. 1. (or nidation) the attachment of the early embryo to the lining of the womb, which occurs at the *blastocyst stage of development, six to eight days after ovulation. The site of implantation determines the position of the placenta. 2. the placing of a substance (e.g. a drug) or an object (e.g. an artificial pacemaker) within the tissue. 2. the surgical replacement of damaged tissue with healthy tissue (see transplantation).