| Implacental | a. (Zool.) Without a placenta, as marsupials and monotremes; nonplacental. -- |
| Implacentalia | ‖n. pl. [ NL. See In- not, and Placental. ] (Zool.) A primary division of the Mammalia, including the monotremes and marsupials, in which no placenta is formed. [ 1913 Webster ] |
| Placental | a. |
| Placental | n. (Zool.) One of the Placentalia. [ 1913 Webster ] |
| Placentalia | ‖n. pl. [ NL. ] (Zool.) A division of Mammalia including those that have a placenta, or all the orders above the marsupials. [ 1913 Webster ] |
| placental | -รก [แพทยศาสตร์ ๖ ส.ค. ๒๕๔๔] |
| placental circulation | การไหลเวียนผ่านรก [แพทยศาสตร์ ๖ ส.ค. ๒๕๔๔] |
| placental presentation; placenta praevia; placenta previa | ๑. รกเกาะต่ำ๒. รกขวางปากมดลูก [แพทยศาสตร์ ๖ ส.ค. ๒๕๔๔] |
| placental souffle | เสียงฟู่ในรก [แพทยศาสตร์ ๖ ส.ค. ๒๕๔๔] |
| aplacental | (เอพละเซน'ทัล) adj. ไม่มีรก |
| placental | (n) mammals having a placenta; all mammals except monotremes and marsupials, Syn. placental mammal, eutherian mammal, eutherian |
| placental | (adj) pertaining to or having or occurring by means of a placenta, Ant. aplacental, Example: all mammals except monotremes and marsupials are placental mammals |