| difficulty | Origin: L. Difficultas, fr. Difficilis difficult; dif- = dis- + facilis easy: cf. F. Difficulte. See Facile. 1. The state of being difficult, or hard to do; hardness; arduousness; opposed to easiness or facility; as, the difficulty of a task or enterprise; a work of difficulty. "Not being able to promote them [the interests of life] on account of the difficulty of the region." (James Byrne) 2. Something difficult; a thing hard to do or to understand; that which occasions labour or perplexity, and requires skill perseverance to overcome, solve, or achieve; a hard enterprise; an obstacle; an impediment; as, the difficulties of a science; difficulties in theology. "They lie under some difficulties by reason of the emperor's displeasure." (Addison) 3. A controversy; a falling out; a disagreement; an objection; a cavil. "Measures for terminating all local difficulties." (Bancroft) 4. Embarrassment of affairs, especially financial affairs; usually in the plural; as, to be in difficulties. "In days of difficulty and pressure." (Tennyson) Synonym: Impediment, obstacle, obstruction, embarrassment, perplexity, exigency, distress, trouble, trial, objection, cavil. See Impediment. Source: Websters Dictionary (01 Mar 1998) |
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| diffluence | The process of becoming fluid. Origin: L. Dif-fluo, to flow in different directions, dissolve (05 Mar 2000) |
| difform | Irregular in form; opposed to uniform; anomalous; hence, unlike; dissimilar; as, to difform corolla, the parts of which do not correspond in size or proportion; difform leaves. "The unequal refractions of difform rays." (Sir I. Newton) Origin: Cf. F. Difforme, fr. L. Dif- = dis- + forma form. Cf. Deform. Source: Websters Dictionary (01 Mar 1998) |
| diffraction | When a wave train passes an obstacle secondary waves are set up that interfere with the primary wave and give rise to bands of constructive and destructive interference. Around a point source of light, in consequence, is a series of concentric light and dark bands (coloured bands with white light), a diffraction pattern. (18 Nov 1997) |
| diffraction grating | <microscopy> An artificially produced periodic array of scattering centres capable of producing a pattern of diffracted energy, such as accurately ruled lines on a plane surface. (05 Aug 1998) |
| diffusate | <chemistry> Material which, in the process of catalysis, has diffused or passed through the separating membrane. Source: Websters Dictionary (01 Mar 1998) |
| diffuse | Not definitely limited or localised, widely distributed. Origin: L. Dis = apart, fundere = to pour (18 Nov 1997) |
| diffuse abdominal calcification | <radiology> Ovarian cystadenocarcinoma (psammomatous Calcium), pseudomyxoma peritonei, pseudomucinous cystadenoma of ovary, mucocele of appendix, undifferentiated abdominal malignancy, TB peritonitis, oil granulomata, meconium peritonitis (12 Dec 1998) |
| diffuse abscess | A collection of pus not circumscribed by a well-defined capsule. (05 Mar 2000) |
| diffuse aneurysm | An aneurysm that has enlarged and spread to the surrounding tissues in consequence of rupture of its walls. Synonym: consecutive aneurysm. (05 Mar 2000) |
| diffuse angiokeratoma | <disease> Lysosomal storage disease caused by a deficiency of alpha-galactosidase a and resulting in an accumulation of globotriaosylceramide in the renal and cardiovascular systems. The disease is characterised by telangiectatic skin lesions, renal failure, and disturbances of the cardiovascular, gastrointestinal, and central nervous systems. Inheritance: x-linked. (08 Mar 2000) |
| diffuse arterial ectasia | Spontaneous enlargement with dilation of the vessels in a circumscribed area. (05 Mar 2000) |
| diffuse brain atrophy | A form of dementia caused by destruction (atrophy) of the frontal lobes of the brain. This condition leads to the progressive deterioration of mental functioning. Incidence: 9 in 10,000 people in the general population. (27 Sep 1997) |
| diffuse choroiditis | A widespread exudative inflammation of the choroid, with progressive resolution of older lesions as new ones occur. (05 Mar 2000) |
| diffuse cutaneous leishmaniasis | Leishmaniasis caused by several New and Old World species and strains of Leishmania (L. Mexicana amazonensis, L. M. Pifanoi, possibly L. M. Garnhami and L. M. Venezuelensis; in Ethiopia, L. Aethiopica, and unidentified leishmanial agents in Namibia and Tanzania). The condition is associated with a suppressed cell-mediated immune response, so that the non-ulcerating, non-necrotizing cutaneous lesions can spread widely over the body; great numbers of parasite-filled macrophages are found in the dermal lesions. Healing does not appear to occur unless an acquired cellular hypersensitivity can develop. Synonym: anergic leishmaniasis, diffuse leishmaniasis, disseminated cutaneous leishmaniasis, leishmaniasis tegumentaria diffusa, pseudolepromatous leishmaniasis. (05 Mar 2000) |
| differential blood count |
counting the number of specific types of white blood cells found in 1 cubic millimeter of blood; may be included as part of a complete blood count
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| diffuse choroiditis |
a widespread, exudative lesion of the choroid.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| diffusing capacity |
diffusion capacity, the ability of the alveolocapillary membrane to transfer gas: a reflection of the thinness and area of the alveolocapillary membrane. It is the amount of gas transferred per minute from the alveolar gas to the pulmonary capillary blood divided by the mean pressure gradient of the gas between the alveolar gas and the capillary blood; unit, mL/min/torr (or mm Hg). Symbol D.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| diffuse inflammation |
one that is both interstitial and parenchymatous or is spread over a large area.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| diffuse lipomatosis |
abnormal increase of subcutaneous fat in the parts above the pelvis, usually in males.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| diff | counting the number of specific types of white blood cells found in 1 cubic millimeter of blood |
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| diff | the part of calculus that deals with the variation of a function with respect to changes in the independent variable (or variables) by means of the concepts of derivative and differential |
| diff | the result of mathematical differentiation |
| diff | the increase or decrease in costs as a result of one more or one less unit of output |
| diff | a systematic method of diagnosing a disorder (e.g., headache) that lacks unique symptoms or signs |
| diff | an equation containing differentials of a function |
| diff | a bevel gear that permits rotation of two shafts at different speeds |
| diff | the smallest change in stimulation that a person can detect |
| diff | the branch of psychology that studies measurable differences between individuals |
| diff | the smallest change in stimulation that a person can detect |
| diff | in a differential manner |
| diff | become distinct and acquire a different character |