scientific definition of muscle fibre
Noun. 1. muscle fibre-an elongated contractile cell that forms the muscles of the body. muscle cell, muscle fiber.fibre, fiber-any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber). muscle, musculus-one of the contractile organs of the body.oun. 1. muscle fibre-an elongated contractile cell that forms the muscles of the body. muscle cell, muscle fiber.
Medical Definition of FIBER. 1. : a thread or a threadlike structure or object: as a: a strand of nerve tissue: axon, dendrite b: one of the filaments composing most of the intercellular matrix of connective tissue c: one of the elongated contractile cells of muscle tissue. 2.edical Definition of FIBER. 1. : a thread or a threadlike structure or object: as a: a strand of nerve tissue: axon, dendrite b: one of the filaments composing most of the intercellular matrix of connective tissue c: one of the elongated contractile cells of muscle tissue. 2.