Etymology : Middle English, from Middle French, from Latin musculus, from diminutive of mus mouse; more at MOUSE
Pronunciation : m&-s&l
Function : noun
Date : 14th century
1. contracting body tissue; strength; part of the body that is made up of muscles. exert strength, force one's way. muscle\mus"cle\ , n. [f., fr. l. musculus a muscle, a little mouse, dim. of mus a mouse. see:
mouse, and cf. sense 3 (below).].
2. (anat.) (a) an organ which, by its contraction, produces motion. see:
illust. of muscles of the human body, in appendix. (b) the contractile tissue of which muscles are largely made up.note: muscles are of two kinds, striated and nonstriated. the striated muscles, which, in most of the higher animals, constitute the principal part of the flesh, exclusive of the fat, are mostly under the control of the will, or voluntary, and are made up of great numbers of elongated fibres bound together into bundles and inclosed in a sheath of connective tissue, the perimysium. each fiber is inclosed in a delicate membrane (the sarcolemma), is made up of alternate segments of lighter and darker material which give it a transversely striated appearance, and contains, scattered through its substance, protoplasmic nuclei, the so-called muscle corpuscles. the nonstriated muscles are involuntary. they constitute a large part of the walls of the alimentary canal, blood vessels, uterus, and bladder, and are found also in the iris, skin, etc. they are made up of greatly elongated cells, usually grouped in bundles or sheets.
3. muscular strength or development; as, to show one's muscle by lifting a heavy weight. [colloq.].
4. [as. muscle, l. musculus a muscle, mussel. see:
above.] (zo?l.) see:
mussel.muscle curve (physiol.), contraction curve of a muscle; a myogram; the curve inscribed, upon a prepared surface, by means of a myograph when acted upon by a contracting muscle. the character of the curve represents the extent of the contraction.
5. An organ which, by its contraction, produces motion.
6. The contractile tissue of which muscles are largely made up.
7. Muscular strength or development; as, to show one's muscle by lifting a heavy weight.
8. See Mussel. authority or power or force ; "the senators used their muscle to get the party leader to resign" animal tissue consisting predominantly of contractile cells one of the contractile organs of the body make one's way by force; "He muscled his way into the office".
9. 1. A muscle is a piece of tissue inside your body which connects two bones and which you use when you make a movement. Keeping your muscles strong and in tone helps you to avoid back problems He is suffering from a strained thigh muscle.
10. If you say that someone has muscle, you mean that they have power and influence, which enables them to do difficult things. Eisenhower used his muscle to persuade Congress to change the law = clout.
11. If a group, organization, or country flexes its muscles, it does something to impress or frighten people, in order to show them that it has power and is considering using it. The Fair Trade Commission has of late been flexing its muscles, cracking down on cases of corruption.
12. If you say that someone did not move a muscle, you mean that they stayed absolutely still. He stood without moving a muscle, unable to believe what his eyes saw so plainly. muscle your way into/through etc sth to use your strength to go somewhere. Contractile tissue that produces motion for functions, including body movements, digestion, focusing, circulation, and body warmth. It can be classified as striated, cardiac, and smooth or as phasic and tonic (responding quickly or gradually to stimulation, respectively). Striated muscle, whose fibres appear striped under a microscope, is responsible for voluntary movement. Most of these muscles are phasic. They are attached to the skeleton and move the body by contracting in response to signals from the central nervous system; contraction is achieved by the sliding of thin filaments (of actin) between thick ones (of myosin); stretch receptors in the tissue provide feedback, allowing smooth motion and fine motor control. The branched fibres of cardiac muscle give it a netlike structure; contraction originates in the heart's muscle tissue itself with a signal from the natural pacemaker; vagus and sympathetic nerves control heart rate. Smooth muscle, the muscle of internal organs and blood vessels, is generally involuntary and tonic; its cells can operate either collectively or individually (in response to separate nerve endings) and have different shapes. Disorders of voluntary muscle cause weakening, atrophy, pain, and twitching. Some systemic diseases (e.g., dermatomyositis, polymyositis) can cause muscle inflammation. See also abdominal muscle; muscle tumour; muscular dystrophy; myasthenia gravis. abdominal muscle Muscle Shoals muscle tumour.