词根词缀：mantel-, mantle-, -manteau

【来源及含义】Latin: mantellum, cloak, veil; by way of Middle English, from Old English mentel and from Old French mantel; resulting in English words that include: mantle, mantel, and manteau

【同源单词】dismantle, dismantlement, dismantler, dismantling, lower mantle, manta

词根词缀：placento-, placent-, placenta-

【来源及含义】Latin: flat cake; cakelike mass, especially the uterine organ that connects the mother to the child by way of the umbilical cord

【同源单词】fetoplacental, incarcerated placenta, placentotherapy, thermoplacentography, zonoplacental