a. Zool. rare. [f. A- pref. 14 + PLACENTAL.] Having no placenta.

1

1857.  Page, Advd. Text-Bk. Geol. (1876), 182. Aplacental, bringing forth immature young. 1. Monotremata, Ornithorhyncus, Echidna. 2. Marsupialia, Kangaroos, Opossums.

2