triceps
Concept
The muscles of the upper arm, which have different heads (long head, monoarticular heads) that can be preferentially stimulated by different exercises like skull crushers and bench press.
Mentioned in 2 videos
Videos Mentioning triceps

Protein Digestion Speed, Bone Density, Push-Pull Ratios (Episode 79)
Stronger By Science
The muscles of the upper arm, which have different heads (long head, monoarticular heads) that can be preferentially stimulated by different exercises like skull crushers and bench press.

Elbow: discussion + exam with orthopedic surgeon, Alton Barron, M.D.
Peter Attia MD
The large muscle on the back of the upper limb of many vertebrates, responsible for extending the elbow.