1. Having no placenta
   "monotremes and marsupials are aplacental mammals"

Antonym: placental

• copse
• Copt
• copter
• Coptic
• Coptic Church
• Coptis
• Coptis groenlandica
• Coptis trifolia groenlandica
• copula
• copular
• copulate
• copulation
• copulative
• copulative conjunction
• copulatory
• copy
• copy editing
• copy editor
• copy out
• copy-and-paste
• copybook
• copycat
• copyedit
• copyhold
• copyholder