‖n. [ NL. adynamia, fr. Gr. 'adynami`a lack of strength; 'a priv + dy`namis power, strength. ] (Med.) Considerable debility of the vital powers; asthenia. Dunglison. [ 1913 Webster + AS ]

2. Specifically: (Med) Absence of motor power or force. [ AS ]

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. Adynamia. [ R. ] Morin. [ 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. ]

‖n. pl. [ NL., fr. Gr. di- = di`s- twice + &unr_; power. ] (Bot.) A Linnæan class of plants having four stamens disposed in pairs of unequal length. [ 1913 Webster ]

‖a. Didynamous. [ 1913 Webster ]

a. (Bot.) Of or pertaining to the Didynamia; containing four stamens disposed in pairs of unequal length. [ 1913 Webster ]

n. [ Cf. F. dyname. See Dynamic. ] A unit of measure for dynamical effect or work; a foot pound. See Foot pound. Whewell. [ 1913 Webster ]

n. [ Gr. &unr_; power + -meter: cf. F. dynamètre. Cf. Dynamometer. ] 1. A dynamometer. [ 1913 Webster ]

2. (Opt.) An instrument for determining the magnifying power of telescopes, consisting usually of a doubleimage micrometer applied to the eye end of a telescope for measuring accurately the diameter of the image of the object glass there formed; which measurement, compared with the actual diameter of the glass, gives the magnifying power. [ 1913 Webster ]

a. Pertaining to a dynameter.

{ } 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 ]

n. [ Cf. F. dynamisme. See Dynamics. ] The doctrine of Leibnitz, that all substance involves force. [ 1913 Webster ]

n. One who accounts for material phenomena by a theory of dynamics. [ 1913 Webster ]

Those who would resolve matter into centers of force may be said to constitute the school of dynamists. Ward (Dyn. Sociol. ). [ 1913 Webster ]

n. A political dynamiter. [ A form found in some newspapers. ] [ 1913 Webster ]

n. [ Gr. &unr_; power. See Dynamic. ] (Chem.) An explosive substance consisting of nitroglycerin absorbed by some inert, porous solid, as infusorial earth, sawdust, etc. It is safer than nitroglycerin, being less liable to explosion from moderate shocks, or from spontaneous decomposition. [ 1913 Webster ]

n. One who uses dynamite; esp., one who uses it for the destruction of life and property. [ 1913 Webster ]

n. Destroying by dynamite, for political ends. [ 1913 Webster ]

Dynamiting is not the American way. The Century. [ 1913 Webster ]

n. The work of dynamiters. [ 1913 Webster ]

[ Gr. &unr_; power. See Dynamic. ] (Homeop.) The act of setting free the dynamic powers of a medicine, as by shaking the bottle containing it. [ 1913 Webster ]

n. A dynamo-electric machine. [ 1913 Webster ]

a. [ Gr. &unr_; power + E. electric. See Dynamic. ] Pertaining to the development of electricity, especially electrical currents, by power; producing electricity or electrical currents by mechanical power. [ 1913 Webster ]

n. [ Gr. &unr_; power + -graph. See Dynamic. ] (Physiol.) A dynamometer to which is attached a device for automatically registering muscular power. [ 1913 Webster ]

n. [ Cf. F. dynamomètre. See Dynameter. ] An apparatus for measuring force or power; especially, muscular effort of men or animals, or the power developed by a motor, or that required to operate machinery. [ 1913 Webster ]

☞ It usually embodies a spring to be compressed or weight to be sustained by the force applied, combined with an index, or automatic recorder, to show the work performed.

{ } a. Relating to a dynamometer, or to the measurement of force doing work; as, dynamometrical instruments. [ 1913 Webster ]

n. The art or process of measuring forces doing work. [ 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. An instrument for measuring the strength of electro-dynamic currents. [ 1913 Webster ]

n. Same as Hemadynamics. [ 1913 Webster ]

pr>(hē`m&adot_;*dī`n&adot_;*m&obreve_;m"&euptack_;*t&etilde_;r or h&ebreve_;m`&adot_;*d&ibreve_;n`&adot_;-), Same as Hemadynamometer. [1913 Webster]

n. Same as Hemadynamometer. [ 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 ]

n. [ Hema- + dynamometr. ] (Physiol.) An instrument by which the pressure of the blood in the arteries, or veins, is measured by the height to which it will raise a column of mercury; -- called also a haemomanometer. [ 1913 Webster ]

a. Homodynamous. Quain. [ 1913 Webster ]

a. (Biol.) Pertaining to, or involving, homodynamy; as, successive or homodynamous parts in plants and animals. [ 1913 Webster ]

n. [ Gr. &unr_; of like power; &unr_; the same + &unr_; power. ] (Biol.) The homology of metameres. See Metamere. Gegenbaur. [ 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 ]

n. [ Hydro-, 1 + dynamometer. ] An instrument to measure the velocity of a liquid current by the force of its impact. [ 1913 Webster ]