amniotic

adj. of or pertaining to the membrane surrounding an embryo (Anatomy, Zoology)

Adjective
1. of or related to the amnion or characterized by developing an amnion; "amniotic membrane"
(synonym) amnionic, amnic
(pertainym) amnion, amniotic sac, amnios

(a.)
Of or pertaining to the amnion; characterized by an amnion; as, the amniotic fluid; the amniotic sac.
  

adjective
referring to the amnion
amniotic cavity = space formed by the amnion, full of amniotic fluid
amniotic fluid = fluid contained in the amnion, which surrounds an unborn baby
amniotic sac = AMNION

The fluid bathing the fetus and serving as a shock absorber.

anat. amniotic