| 单词 | mass |
| 释义 | mass 1. n., v., & adj. --n 1. a coherent body of matter of indefinite shape. 2. a dense aggregation of objects (a mass of fibres). 3. (in sing. or pl.; foll. by of) a large number or amount. 4. (usu. foll. by of) an unbroken expanse (of colour etc.). 5. (foll. by of) covered or abounding in (was a mass of cuts and bruises). 6. a main portion (of a painting etc.) as perceived by the eye. 7. (prec. by the) a the majority. b (in pl.) the ordinary people. 8. Physics the quantity of matter a body contains. 9. (attrib.) relating to, done by, or affecting large numbers of people or things; large-scale (mass audience; mass action; mass murder). --vtr. & intr. 1. assemble into a mass or as one body (massed bands). 2. Mil. (with ref. to troops) concentrate or be concentrated. Phrases and idioms centre of mass a point representing the mean position of matter in a body or system. in the mass in the aggregate. law of mass action the principle that the rate of a chemical reaction is proportional to the masses of the reacting substances. mass defect the difference between the mass of an isotope and its mass number. mass energy a body's ability to do work according to its mass. mass media = MEDIA(1) 2. mass noun Gram. a noun that is not countable and cannot be used with the indefinite article or in the plural (e.g. bread). mass number the total number of protons and neutrons in a nucleus. mass observation Brit. the study and recording of the social habits and opinions of ordinary people. mass-produce produce by mass production. mass production the production of large quantities of a standardized article by a standardized mechanical process. mass spectrograph an apparatus separating isotopes, molecules, and molecular fragments according to mass by their passage in ionic form through electric and magnetic fields. mass spectrometer a device similar to a mass spectrograph but employing electrical detection. mass spectrum the distribution of ions shown by the use of a mass spectrograph or mass spectrometer. Derivatives massless adj. Etymology: ME f. OF masse, masser f. L massa f. Gk maza barley-cake: perh. rel. to masso knead 2. n. (often Mass) 1. the Eucharist, esp. in the Roman Catholic Church. 2. a celebration of this. 3. the liturgy used in the mass. 4. a musical setting of parts of this. Phrases and idioms high mass mass with incense, music, and usu. the assistance of a deacon and subdeacon. low mass mass with no music and a minimum of ceremony. Etymology: OE m{aelig}sse f. eccl.L missa f. L mittere miss- dismiss, perh. f. the concluding dismissal Ite, missa est Go, it is the dismissal |
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