Using a customer supplied envelope, an individual can mail a Priority Mail Express letter envelope weighing one ounce up to sixteen ounces for $31.20 plus the extra fee of $12.50 to add Sunday/Holiday Delivery.
muscle cell-an elongated contractile cell that forms the muscles of the body. muscle fiber, muscle fibre. fibre, fiber-any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber).
muscle n 1 a tissue composed of bundles of elongated cells capable of contraction and relaxation to produce movement in an organ or part 2 an organ composed of muscle tissue 3 strength or force vb 4 intr; often foll by: in, on, etc.