Muscle
/mˈʌsəl/
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Definition
(noun) A contractile form of tissue which animals use to effect movement.
Sentence Examples
Muscle tissue consists of innumerable cells.
Hence 50 percent of the muscle can give way to fat.
CEFR Practice Quiz
After working in the garden all day, I felt a sharp pain in my back ____, which made it very difficult for me to bend over or lift anything heavy.