- previllous
- \(ˈ)prē+\ adjective
Etymology: pre- + villous: occurring before the formation of villi
an embryo in the previllous stage
: not yet having villia previllous human embryo
Useful english dictionary. 2012.
previllous
Look at other dictionaries:
previllous — pre·vil·lous vil əs adj relating to, being in, or being the stage of embryonic development before the formation of villi <a previllous human embryo> … Medical dictionary
previllous — pre·villous … English syllables
previllous embryo — the conceptus before the chorionic villi of the placenta develop … Medical dictionary
Chorion — The outermost of the two fetal membranes—the amnion is the innermost . which together surround the embryo. The chorion develops villi (vascular fingers) and gives rise to the placenta. In Greek, the word "chorion" means "skin… … Medical dictionary
Embryo — The organism in the early stages of growth and differentiation from fertilization to, in humans, the beginning of the third month of pregnancy. After that point in time, it is termed a fetus. * * * 1. An organism in the early stages of… … Medical dictionary
