| 释义 |
effusion
ef·fu·sion E0051200 (ĭ-fyo͞o′zhən)n.1. a. The act or an instance of effusing.b. Liquid or other matter poured forth.2. An unrestrained outpouring of feeling, as in speech or writing: "the devout effusions of sacred eloquence" (Edmund Burke).3. Medicine a. The seeping of serous, purulent, or bloody fluid into a body cavity or tissue.b. The effused fluid.effusion (ɪˈfjuːʒən) n1. an unrestrained outpouring in speech or words2. the act or process of being poured out3. something that is poured out4. (General Physics) the flow of a gas through a small aperture under pressure, esp when the density is such that the mean distance between molecules is large compared to the diameter of the aperture5. (Medicine) med a. the escape of blood or other fluid into a body cavity or tissueb. the fluid that has escapedef•fu•sion (ɪˈfyu ʒən)
n. 1. the act of effusing or pouring forth. 2. something that is effused. 3. an unrestrained expression, as of feelings. 4. a. the escape of a fluid, as blood, from its natural vessels into a body cavity. b. the fluid that escapes. 5. the flow of a gas with a mean distance between molecules that is large compared to the diameter of the orifice through which it flows. [1350–1400; < Latin] effusionThe process by which a gas under pressure moves through a small aperture into an region of lower pressure.Thesaurus| Noun | 1. | effusion - an unrestrained expression of emotionebullition, outburst, blowup, gushexpression, reflexion, reflection, manifestation - expression without words; "tears are an expression of grief"; "the pulse is a reflection of the heart's condition"acting out - a (usually irritating) impulsive and uncontrollable outburst by a problem child or a neurotic adultcry - a fit of weeping; "had a good cry"explosion - a sudden outburst; "an explosion of laughter"; "an explosion of rage"flare - a sudden outburst of emotion; "she felt a flare of delight"; "she could not control her flare of rage" | | 2. | effusion - flow under pressureoverflow, flood, outpouring - a large flow |
TranslationseffusionépanchementefflussoeffusioneEffusion
effusion1. the flow of a gas through a small aperture under pressure, esp when the density is such that the mean distance between molecules is large compared to the diameter of the aperture 2. Meda. the escape of blood or other fluid into a body cavity or tissue b. the fluid that has escaped Effusion the slow leakage of gas through a small aperture. Two cases of effusion are distinguished. In the first case, the diameter of the opening is small compared with the mean free path of the molecules (the pressure in the vessel is very low). In such a case, molecular effusion occurs in which collisions between molecules play no part, and the overall volume of gas escaping per unit time is  , where S is the area of the aperture, μ is the molecular mass of the gas, R is the universal gas constant, T is the absolute temperature of the gas, and p1 and p2 are the gas pressures on the two sides of the aperture. The effusion method of measuring very low pressures (about 10–3–10–4 mm Hg) is based on this case. In the second case, where the gas pressure is so high that the mean free path is smaller than the diameter of the aperture, the leakage of gas obeys the laws of hydrodynamics. The molecules escape from the aperture in the form of a jet, and the volume of gas discharged per unit time is inversely proportional to the square root of the density of the gas. This law underlies a method of determining the density of gases from the time of their discharge through small apertures (0.10–0.01 mm). However, if the pressure within the vessel is considerably greater than the external pressure, the amount of gas escaping is proportional to the pressure in the vessel.
Effusion the process of lava (magma) pouring out onto the earth’s surface. When the lava cools, effusive rocks are formed, bedded in the form of lava flows and lava sheets. Effusion, one of the manifestations of volcanic activity, is usually accompanied by an explosion, with discharges of small fragments (volcanic ash, sand, or tuff) or large chunks (volcanic bombs and slags). Viscous acidic lava sometimes will not flow, but rather is extended, forming volcanic domes. effusion[e′fyü·zhən] (medicine) A pouring out of any fluid into a body cavity or tissue. (physical chemistry) The movement of a gas through an opening which is small as compared with the average distance which the gas molecules travel between collisions. (science and technology) The act or process of leaking or pouring out. Any material that is effused. effusion
effusion [ĕ-fu´zhun] 1. escape of a fluid into a part; exudation or transudation.2. an exudate or transudate.chyliform effusion see chylothorax.chylous effusion see chylothorax.pericardial effusion the accumulation of an abnormally large amount of pericardial fluid in the pericardium. Accumulated fluid from a pericardial effusion evacuated by the subxiphoid approach to pericardiocentesis. From Polaski and Tatro, 1996.pleural effusion see pleural effusion.pseudochylous effusion see chylothorax.ef·fu·sion (e-fyū'zhŭn), 1. The escape of fluid from the blood vessels or lymphatics into the tissues or a cavity. 2. A collection of the fluid effused. [L. effusio, a pouring out] effusion (ĭ-fyo͞o′zhən)n.1. a. The act or an instance of effusing.b. Liquid or other matter poured forth.2. Medicine a. The seeping of serous, purulent, or bloody fluid into a body cavity or tissue.b. The effused fluid.effusion Accumulation of fluid in various spaces of the body, or the knee itself, which is a frequent byproduct of injury. See Ascites, Peritoneal effusion, Pleural effusion, Pseudochylous effusion, Subdural effusion. ef·fu·sion (e-fyu'zhŭn) 1. The escape of fluid from the blood vessels or lymphatics into the tissues or a cavity. 2. A collection of the fluid effused. [L. effusio, a pouring out]effusion 1. Movement of fluid from its usual situation, to form a collection elsewhere. 2. The collection of fluid in an abnormal site, as in a pleural effusion, a pericardial effusion or a joint effusion. EffusionThe escape of fluid from blood vessels or the lymphatic system and its collection in a cavity, in this case, the middle ear.Mentioned in: Myringotomy and Ear Tubes, Otitis Media, Pleurisyef·fu·sion (e-fyu'zhŭn) 1. Escape of fluid from blood vessels or lymphatics into tissues or cavity. 2. Collection of effused fluid. [L. effusio, a pouring out]effusion
Related to effusion: pleural effusion, Pericardial effusionSynonyms for effusionnoun an unrestrained expression of emotionSynonyms- ebullition
- outburst
- blowup
- gush
Related Words- expression
- reflexion
- reflection
- manifestation
- acting out
- cry
- explosion
- flare
noun flow under pressureRelated Words |