dominantmuscle
nounUK /ˈdɒmɪnənt ˈmʌsəl/
US /ˈdɑːmɪnənt ˈmʌsəl/
The dominant muscle is the strongest muscle that does most of the work.
When you lift a heavy box, your dominant muscle does most of the lifting.
OTHER MEANINGS
2. The muscle that controls a movement most of the time.
The dominant muscle in your arm helps you wave hello.
3. The muscle that wins over other muscles in a contest.
In a tug-of-war, the dominant muscle group pulls the hardest.
4. The muscle that is used first when you do an action.
Your dominant muscle starts the jump before the others help.