Rage gland
A rage gland was a type of gland.

In 2256, when the  was examining the behavior of the  for methods of supporting the war between the Federation and the Klingon Empire, Commander Ellen Landry suggested to Michael Burnham that the creature, nicknamed "Ripper", might have had a rage gland or a venom sac that might prove advantageous in their effort to weaponize it. ()
Glands