Full of or having a lot of muscles; muscular.

(horse-racing) Of a horse: frisky and energetic, seeming keen to race.

simple past tense and past participle of muscle in

(anatomy) An infrahyoid muscle on each side of the body below the sternohyoid muscle that arises from the sternum and from the cartilage of the first and sometimes of the second ribs, inserts into the thyroid cartilage, and acts to draw the larynx downward by depressing the thyroid cartilage.

(anatomy) An infrahyoid muscle on each side of the midline that arises from the medial end of the clavicle and the first segment of the sternum, inserts into the body of the hyoid bone, and acts to depress the hyoid bone and the larynx.

(anatomy) A long slender digastric muscle which arises from the upper border of the shoulder blade and passes obliquely along the side and front of the neck to the lower border of the body of the hyoid bone, and acts to draw the hyoid bone in a caudal direction.

(anatomy) Either of two muscles arising respectively from the lateral and medial surfaces of the lateral pterygoid process which serve to move the mandible forwards and to the side.

(anatomy) A flat triangular muscle located above the anterior belly of the digastric muscle, that runs from the mandible to the hyoid bone and is joined at a median raphe to its fellow of the opposite side, forming a large part of the muscular floor of the oral cavity.

(anatomy) A muscle acting in a direction oblique to the mesial plane of the body, or to the associated muscles, applied especially to two muscles of the eyeball.

(anatomy) Muscle that is not controlled by individual volition; cardiac muscle and smooth muscle.