Acardiac

The Century Dictionary and Cyclopedia
  • Without a heart.
  • the GNU version of the Collaborative International Dictionary of English
  • adjective. Without a heart.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • adjective. Lacking a heart.
  • Word Usage
    "When blood flows in reverse through an acardiac twin (one without a functioning heart) as it is pumped by the other, typically normal twin."