Meaning of placentally in English:

placentally

Pronunciation /pləˈsɛntəli/ /pləˈsɛnt(ə)li/

adverb

Physiology Zoology
  • By means of a placenta; in, through, or from the placenta.

Origin

Mid 19th century; earliest use found in Richard Owen (1804–1892), comparative anatomist and palaeontologist. From placental + -ly.