a. [ Cf. F. adynamique. See Adynamy. ] 1. (Med.) Pertaining to, or characterized by adynamia; weak. [ 1913 Webster + AS ]

2. (Physics) Characterized by the absence of power or force. [ 1913 Webster ]

Adynamic fevers, malignant or putrid fevers attended with great muscular debility. [ 1913 Webster ]

n. 1. the resistance caused by a gas to the motion of a solid body moving through it. Studied in aerodynamics. [ PJC ]

n. [ Aëro- + dynamics: cf. F. aérodynamique. ] The science which treats of the air and other gaseous bodies under the action of force, and of their mechanical effects. [ 1913 Webster ]

a. [ Aëro- + hydrodynamic. ] Acting by the force of air and water; as, an aërohydrodynamic wheel. [ 1913 Webster ]

a. 1. Pertaining to the force of air in motion. [ 1913 Webster ]

2. having a shape designed to minimize wind resistance (aerodynamic drag) when moving through the air or other gas; -- used especially of vehicles; as, the aerodynamic styling of an automobile. [ PJC ]

a. [ Auto- + dynamic. ] Supplying its own power, as a hydraulic ram. [ Webster 1913 Suppl. ]

{ , a. } 1. (Biol.) Of or pertaining to biodynamics, or the doctrine of vital forces or energy. [ Webster 1913 Suppl. ]

2. of or pertaining to a method of farming that uses only organic fertilizers (rather than chemical fertilizers) and organic materials for improving the soil characteristics. [ PJC ]

n. [ Gr. bi`os life + E. dynamics. ] 1. (Biol.) The doctrine of vital forces or energy. [ archaic ] [ 1913 Webster ]

2. The branch of biology which treats of the active vital phenomena of organisms; -- opposed to biostatics. [ Webster 1913 Suppl. ]

{ } a. [ Gr. &unr_; powerful, fr. &unr_; power, fr. &unr_; to be able; cf. L. durus hard, E. dure: cf. F. dynamique. ] 1. Of or pertaining to dynamics; belonging to energy or power; characterized by energy or production of force. [ 1913 Webster ]

Science, as well as history, has its past to show, -- a past indeed, much larger; but its immensity is dynamic, not divine. J. Martineau. [ 1913 Webster ]

The vowel is produced by phonetic, not by dynamic, causes. J. Peile. [ 1913 Webster ]

2. Relating to physical forces, effects, or laws; as, dynamical geology. [ 1913 Webster ]

As natural science has become more dynamic, so has history. Prof. Shedd. [ 1913 Webster ]

Dynamical electricity. See under Electricity. [ 1913 Webster ]

WordNet lists a number of narrower terms for dynamic and adj. [ Narrower terms: can-do; driving; energizing, energising, kinetic; forceful, slashing, vigorous; projectile; propellant, propellent, propelling, propulsive; renascent, resurgent; self-propelled, self-propelling; high-octane, high-powered, high-power, high-voltage ] [ WordNet 1.5 ]

adv. In accordance with the principles of dynamics or moving forces. J. Peile. [ 1913 Webster ]

n. [ Random Access Memory. ] (Computers) a type of random access memory using circuits that require periodic refresh cycles in order to retain the stored information. Contrasted to static ram, which maintains the memory state as long as the power is still applied. [ acron. ] dynamic RAM is cheaper to manufacture, but because of the need for a refresh cycle, is generally slower to access than static RAM. It is usually implemented in integrated rircuit chips containing thousands to millions of bits of information storage capacity, and is commonly used as the main type of memory circuit in personal computers.
Syn. -- DRAM, D-RAM. [ PJC ]

n. 1. That branch of mechanics which treats of the motion of bodies (Kinematics) and the action of forces in producing or changing their motion (kinetics). Dynamics is held by some recent writers to include statics and not kinematics. [ 1913 Webster ]

2. The moving moral, as well as physical, forces of any kind, or the laws which relate to them. [ 1913 Webster ]

3. (Mus.) That department of musical science which relates to, or treats of, the power of tones. [ 1913 Webster ]

{ } a. (Physics) Pertaining to the movements or force of electric or galvanic currents; dependent on electric force. [ 1913 Webster ]

n. 1. The phenomena of electricity in motion. [ 1913 Webster ]

2. The branch of science which treats of the properties of electric currents; dynamical electricity. [ 1913 Webster ]

n. Same as Hemadynamics. [ 1913 Webster ]

n. [ Hema- + dynamics. ] (Physiol.) The principles of dynamics in their application to the blood; that part of science which treats of the motion of the blood. [ 1913 Webster ]

a. Homodynamous. Quain. [ 1913 Webster ]

{ } a. [ Hydro-, 1 + dynamic, -ical: cf. F. hydrodynamique. ] Pertaining to, or derived from, the dynamical action of water of a liquid; of or pertaining to water power. [ 1913 Webster ]

Hydrodynamic friction, friction produced by the viscosity of a liquid in motion. [ 1913 Webster ]

n. [ Hydro-, 1 + dynamics: cf. F. hydrodynamique. ] That branch of the science of mechanics which relates to fluids, or, as usually limited, which treats of the laws of motion and action of nonelastic fluids, whether as investigated mathematically, or by observation and experiment; the principles of dynamics, as applied to water and other fluids. [ 1913 Webster ]

☞ The word is sometimes used as a general term, including both hydrostatics and hydraulics, together with pneumatics and acoustics. See Hydraulics. [ 1913 Webster ]

a. [ Iso- + dynamic. ] Of, pertaining to, having, or denoting, equality of force. [ 1913 Webster ]

Isodynamic foods (Physiol.), those foods that produce a similar amount of heat. --
Isodynamic lines (Magnetism), lines on the earth's surface connecting places at which the magnetic intensity is the same. [ 1913 Webster ]

n. The study of the interaction of magnetic fields with electrically conductive fluids, such as a plasma or a molten metal. [ WordNet 1.5 ]

a. [ Mono- + dynamic. ] Possessing but one capacity or power. “Monodynamic men.” De Quincey. [ 1913 Webster ]

n. [ Myo- + dynamics. ] (Physiol.) The department of physiology which deals with the principles of muscular contraction; the exercise of muscular force or contraction. [ 1913 Webster ]

n. [ Photo- + dynamics. ] (Plant Physiol.) The relation of light to the movements of plants and their organs; the study of the phenomena of curvatures induced by the stimulus of light. -- Pho`to*dy*nam"ic Pho`to*dy*nam"ic*al a. [ Webster 1913 Suppl. ]

a. [ Gr. &unr_; far + E. dynamic. ] Relating to a system for transmitting power to a distance by means of swiftly moving ropes or cables driving grooved pulleys of large diameter. [ 1913 Webster ]

a. [ Thermo- + dynamic. ] (Physics) Relating to thermodynamics; caused or operated by force due to the application of heat. [ 1913 Webster ]

Thermodynamic function. See Heat weight, under Heat. [ 1913 Webster ]

n. The science which treats of the mechanical action or relations of heat. [ 1913 Webster ]