aborted

adjective4

1. •
   Stopped before completion; especially because of problems or danger.
2. •
   Brought forth prematurely.
3. •
   Rendered abortive or sterile; undeveloped.

   • The eyes of the cirripeds are more or less aborted in their mature state. — 1855
4. •
   Checked in normal development at an early stage.

   • Spines are aborted branches.