| accommodation | <ophthalmology, physiology> Adjustment, especially that of the eye for various distances resulting in pupil constriction or dilatation. Origin: L. Accommodare = to fit to (18 Nov 1997) |
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| accommodation of eye | The increase in thickness and convexity of the eye's lens in order to focus the image of an external object upon the retina. (05 Mar 2000) |
| accommodation of nerve | <anatomy, nerve> The property of a nerve by which it adjusts to a slowly increasing strength of stimulus, so that its threshold of excitation is greater than it would be were the stimulus strength to have risen more rapidly. (05 Mar 2000) |
| accommodation reflex | Increased convexity of the lens, due to contraction of the ciliary muscle and relaxation of the suspensory ligament, to maintain a distinct retinal image. (05 Mar 2000) |
| accommodation, ocular | The dioptric adjustment of the eye (to attain maximal sharpness of retinal imagery for an object of regard) referring to the ability, to the mechanism, or to the process. It is the effecting of refractive changes by changes in the shape of the crystalline lens. Loosely, it refers to ocular adjustments for vision at various distances. (12 Dec 1998) |
| accommodative | Relating to accommodation. (05 Mar 2000) |
| accommodative asthenopia | Asthenopia due to errors of refraction and excessive contraction of the ciliary muscle. (05 Mar 2000) |
| accommodative convergence | The meter angle of convergence expressed in diopters; equal to the product of the meter angles of convergence times the interpupillary distance measured in centimeters. (05 Mar 2000) |
| accommodative convergence-accommodation ratio | The amount of convergence (measured in prism diopters of convergence) divided by the amount of accommodation (measured in diopters) required to direct both eyes upon an object. (05 Mar 2000) |
| accommodative strabismus | Strabismus in which the severity of deviation varies with accommodation. (05 Mar 2000) |
| accompanying vein | A vein accompanying another structure. Synonym: accompanying vein, companion vein. (05 Mar 2000) |
| accompanying vein of hypoglossal nerve | Runs with the hypoglossal nerve below and lateral to the hyoglossus muscle, emptying usually into the lingual vein. Synonym: accompanying vein of hypoglossal nerve. (05 Mar 2000) |
| accomplice | A bacterium which accompanies the main infecting agent in a mixed infection and which influences the virulence of the main organism. Origin: M.E., fr. O.Fr., fr. L. Comples, closely connected (05 Mar 2000) |
| accomplish | 1. To complete, as time or distance. "That He would accomplish seventy years in the desolations of Jerusalem." (Dan. Ix. 2) "He had accomplished half a league or more." (Prescott) 2. To bring to an issue of full success; to effect; to perform; to execute fully; to fulfill; as, to accomplish a design, an object, a promise. "This that is written must yet be accomplished in me." (Luke xxii. 37) 3. To equip or furnish thoroughly; hence, to complete in acquirements; to render accomplished; to polish. "The armorers accomplishing the knights." (Shak) "It [the moon] is fully accomplished for all those ends to which Providence did appoint it." (Wilkins) "These qualities . . . Go to accomplish a perfect woman." (Cowden Clarke) 4. To gain; to obtain. Synonym: To do, perform, fulfill, realize, effect, effectuate, complete, consummate, execute, achieve, perfect, equip, furnish. To Accomplish, Effect, Execute, Achieve, Perform. These words agree in the general idea of carrying out to some end proposed. To accomplish (to fill up to the measure of the intention) generally implies perseverance and skill; as, to accomplish a plan proposed by one's self, an object, a design, an undertaking. "Thou shalt accomplish my desire." "He . . . Expressed his desire to see a union accomplished between England and Scotland." (Macaulay) To effect (to work out) is much like accomplish. It usually implies some degree of difficulty contended with; as, he effected or accomplished what he intended, his purpose, but little. "What he decreed, he effected." "To work in close design by fraud or guile What force effected not." (Milton) To execute (to follow out to the end, to carry out, or into effect) implies a set mode of operation; as, to execute the laws or the orders of another; to execute a work, a purpose, design, plan, project. To perform is much like to do, though less generally applied. It conveys a notion of protracted and methodical effort; as, to perform a mission, a part, a task, a work. "Thou canst best perform that office." "The Saints, like stars, around his seat Perform their courses still." (Keble) To achieve (to come to the end or arrive at one's purpose) usually implies some enterprise or undertaking of importance, difficulty, and excellence. Origin: OE. Acomplissen, OF. Accomplir, F. Accomplir; L. Ad + complere to fill up, complete. See Complete, Finish. Source: Websters Dictionary (01 Mar 1998) |