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The muscular locomotive organ of a mollusk. It is a median organ arising from the ventral region of body, often in the form of a flat disk, as in snails. See Illust. of Buccinum.

nd; as, the force of gravity; cohesive force; centrifugal force. Animal force (Physiol.), muscular force or energy. -- Catabiotic force Etym: [Gr. (Biol.), the influence exerted by living structures on adjoining cells, by which the latter are developed in harmony with the primary structures. -- Centrifugal force, Cen…

ral shells, and the land and fresh-water snails. They generally creep by means of a flat, muscular disk, or foot, on the ventral side of the body. The head usually bears one or two pairs of tentacles. See Mollusca. [Written also Gasteropoda.]

The muscular stomach, or gizzard, of birds.

The second, or true, muscular stomach of birds, in which the food is crushed and ground, after being softened in the glandular stomach (crop), or lower part of the esophagus; the gigerium.

A hollow, muscular organ, which, by contracting rhythmically, keeps up the circulation of the blood. Why does my blood thus muster to my heart! Shak.

Abnormally increased muscular movement; spasm.

Applied to those actions, or muscular movements, which are automatic expressions of dominant ideas, rather than the result of distinct volitional efforts, as the act of expressing the thoughts in speech, or in writing, while the mind is occupied in the composition of the sentence. Carpenter.

Inciting to motion; -- applied to that action which, in the case of muscular motion, commences in the nerve centers, and excites the muscles to contraction. Opposed to excito-motor.

agencies; incomprehensible; as, it is inconceivable to us how the will acts in producing muscular motion. It is inconceivable to me that a spiritual substance should represent an extended figure. Locke. -- In`con*ceiv"a*ble*ness, n. -- In`con*ceiv"a*bly, adv. The inconceivableness of a quality existing without any su…

Want of coördination; lack of harmonious adjustment or action. Incoördination of muscular movement (Physiol.), irregularity in movements resulting from inharmonious action of the muscles in consequence of loss of voluntary control over them.

.), the primitive, embryonic, undifferentiated tissue, before conversion into connective, muscular, nervous, or other definite tissue.

substance of the spinal cord. It is attended with febrile symptoms, motor paralysis, and muscular atrophy, often producing permanent deformities. Called also acute anterior poliomyelitis.

To spring free from the ground by the muscular action of the feet and legs; to project one's self through the air; to spring; to bound; to leap. Not the worst of the three but jumps twelve foot and a half by the square. Shak.

A mode of treating disease by appropriate muscular movements; - - also termed kinesitherapy, kinesipathy, lingism, and the movement cure.

lly when fatiguing, irksome, or unavoidable, in distinction from sportive exercise; hard, muscular effort directed to some useful end, as agriculture, manufactures, and like; servile toil; exertion; work. God hath set Labor and rest, as day and night, to men Successive. Milton.

A bundle or fascicle of muscular fibers.

d to be existing without manifesting itself. (b) (Physiol.) One of the phases in a simple muscular contraction, in which invisible preparatory changes are taking place in the nerve and muscle. (c) (Biol.) One of those periods or resting stages in the development of the ovum, in which development is arrested prior to re…

Of or pertaining to that side of the body in man on which the muscular action of the limbs is usually weaker than on the other side; -- opposed to right, when used in reference to a part of the body; as, the left ear. Also said of the corresponding side of the lower animals. Left bank of a river, that which is on the l…

al, disease of sheep and other domestic animals, of unknown cause. It is characterized by muscular tremors and spasms, followed by more or less complete paralysis. The principal lesion is an inflammation of the membranes covering the brain and spinal cord.