| motion | 1. The act, process, or state of changing place or position; movement; the passing of a body from one place or position to another, whether voluntary or involuntary; opposed to rest. "Speaking or mute, all comeliness and grace attends thee, and each word, each motion, forms." (Milton) 2. Power of, or capacity for, motion. "Devoid of sense and motion." (Milton) 3. Direction of movement; course; tendency; as, the motion of the planets is from west to east. "In our proper motion we ascend." (Milton) 4. Change in the relative position of the parts of anything; action of a machine with respect to the relative movement of its parts. "This is the great wheel to which the clock owes its motion." (Dr. H. More) 5. Movement of the mind, desires, or passions; mental act, or impulse to any action; internal activity. "Let a good man obey every good motion rising in his heart, knowing that every such motion proceeds from God." (South) 6. A proposal or suggestion looking to action or progress; especially, a formal proposal made in a deliberative assembly; as, a motion to adjourn. "Yes, I agree, and thank you for your motion." (Shak) 7. An application made to a court or judge orally in open court. Its object is to obtain an order or rule directing some act to be done in favor of the applicant. 8. Change of pitch in successive sounds, whether in the same part or in groups of parts. "The independent motions of different parts sounding together constitute counterpoint." (Grove) Conjunct motion is that by single degrees of the scale. Contrary motion is that when parts move in opposite directions. Disjunct motion is motion by skips. Oblique motion is that when one part is stationary while another moves. Similar or direct motion is that when parts move in the same direction. 9. A puppet show or puppet. "What motion's this? the model of Nineveh?" (Beau. & Fl) Motion, in mechanics, may be simple or compound. Simple motions are: (a) straight translation, which, if of indefinite duration, must be reciprocating. (b) Simple rotation, which may be either continuous or reciprocating, and when reciprocating is called oscillating. (c) Helical, which, if of indefinite duration, must be reciprocating. Compound motion consists of combinations of any of the simple motions. Center of motion, Harmonic motion, etc. See Center, Harmonic, etc. Motion block, an incessant motion conceived to be attainable by a machine supplying its own motive forces independently of any action from without. Synonym: See Movement. Origin: F, fr. L. Motio, fr. Movere, motum, to move. See Move. Source: Websters Dictionary (01 Mar 1998) |
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| motion perception | The real or apparent movement of objects through the visual field. (12 Dec 1998) |
| motion pictures | The art, technique, or business of producing motion pictures for entertainment, propaganda, or instruction. (12 Dec 1998) |
| motion sickness | <neurology> A disturbance of the inner ear that is caused by repeated motion (for example sea sickness, car sickness). Common symptoms include nausea, vomiting and vertigo. (27 Sep 1997) |
| motion therapy, continuous passive | Movement of a body part initiated and maintained by a mechanical or electrical device to restore normal range of motion to joints, muscles, or tendons after surgery, prosthesis implantation, contracture flexion, or long immobilization. (12 Dec 1998) |
| continuous passive motion | A technique in which a joint, usually the knee, is moved constantly in a mechanical splint to prevent stiffness and to increase the range of motion. (05 Mar 2000) |
| space motion sickness | Disorder characterised by nausea, vomiting, and dizziness, possibly in response to vestibular disorientation or fluid shifts associated with space flight. (12 Dec 1998) |
| drift motion | <radiobiology> Ordinarily particles placed in a magnetic field will simply orbit in circles, but if the magnetic field is not uniform, or curves, or there is an electrical field perpendicular to the magnetic field, or another force is applied perpendicular to the magnetic field, then the guiding centres of the particle orbits will drift (generally perpendicular to the magnetic field and to the applied force). (09 Oct 1997) |
| time and motion studies | The observation and analysis of movements in a task with an emphasis on the amount of time required to perform the task. (12 Dec 1998) |
| equations of motion | <radiobiology> Set of equations describing the time evolution of the variables which describe the state of a physical system. (09 Oct 1997) |
| excito-motion | <physiology> Motion excited by reflex nerves. See Excito-motory. Source: Websters Dictionary (01 Mar 1998) |
| aerobic exercise | Brisk exercise that promotes the circulation of oxygen through the blood. Examples include running, swimming, and cycling. (12 Dec 1998) |
| asthma, exercise-induced | Asthma attacks following a period of exercise. Usually the induced attack is short-lived and regresses spontaneously. The magnitude of postexertional airway obstruction is strongly influenced by the environment in which exercise is performed (i.e. Inhalation of cold air during physical exertion markedly augments the severity of the airway obstruction; conversely, warm humid air blunts or abolishes it). (12 Dec 1998) |
| Master's two-step exercise test | An early and long-used exercise challenge to identify ischemic heart disease using a pair of nine inch steps with a platform on top, the number of trips by the patient arbitrarily chosen and related to age and body weight. See: two-step exercise test. Synonym: Master's two-step exercise test. (05 Mar 2000) |
| isometric exercise | Exercise consisting of muscular contractions without movement of the involved parts of the body. (05 Mar 2000) |