| 单词 | base |
| 释义 | Word Frequency base 1(beɪs) noun 1. the bottom or supporting part of anything 2. the fundamental or underlying principle or part, as of an idea, system, or organization; basis 3. a. a centre of operations, organization, or supply the climbers made a base at 8000 feet b. (as modifier) base camp 4. a centre from which military activities are coordinated 5. anything from which a process, as of measurement, action, or thought, is or may bebegun; starting point the new discovery became the base for further research 6. the main ingredient of a mixture to use rice as a base in cookery 7. a chemical compound that combines with an acid to form a salt and water. A solutionof a base in water turns litmus paper blue, produces hydroxyl ions, and has a pH greater than 7. Bases are metal oxides or hydroxides or amines See also Lewis base 8. biochemistry any of the nitrogen-containing constituents of nucleic acids: adenine, thymine (in DNA), uracil (in RNA), guanine, or cytosine 9. a medium such as oil or water in which the pigment is dispersed in paints, inks, etc; vehicle 10. the inorganic material on which the dye is absorbed in lake pigments; carrier 11. biology a. the part of an organ nearest to its point of attachment b. the point of attachment of an organ or part 12. the bottommost layer or part of anything 13. architecture a. the lowest division of a building or structure b. the lower part of a column or pier 14. another word for baseline (sense 2) 15. the lower side or face of a geometric construction 16. mathematics a. the number of distinct single-digit numbers in a counting system, and so the numberrepresented as 10 in a place-value system the binary system has two digits, 0 and 1, and 10 to base 2 represents 2 place-value b. (of a logarithm or exponential) the number whose powers are expressed since 1000 = 103, the logarithm of 1000 to base 10 is 3 c. (of a mathematical structure) a substructure from which the given system can be generated d. the initial instance from which a generalization is proven by mathematical induction 17. Also called: base clause logic, mathematics the initial element of a recursive definition, that defines the first element of the infinite sequence generated thereby 18. linguistics a. a root or stem b. base component 19. electronics the region in a transistor between the emitter and collector 20. photography the glass, paper, or cellulose-ester film that supports the sensitized emulsion with which it is coated 21. heraldry the lower part of the shield 22. jewellery the quality factor used in pricing natural pearls 23. a starting or finishing point in any of various games 24. baseball any of the four corners of the diamond, which runners have to reach in order to score 25. the main source of a certain commodity or element a customer base their fan base 26. off base 27. touch base verb 28. (tr foll by on or upon) to use as a basis (for); found (on) your criticisms are based on ignorance 29. (often foll by at or in) to station, post, or place (a person or oneself) Word origin C14: from Old French, from Latin basis pedestal; see basisWord Frequency base 2(beɪs) adjective 1. devoid of honour or morality; ignoble; contemptible 2. of inferior quality or value 3. debased; alloyed; counterfeit base currency 4. English history a. (of land tenure) held by villein or other ignoble service b. holding land by villein or other ignoble service 5. archaic born of humble parents; plebeian 6. archaic illegitimate adjective, noun 7. music an obsolete spelling of bass1 Derived forms basely (ˈbasely) adverb baseness (ˈbaseness) noun Word origin C14: from Old French bas, from Late Latin bassus of low height, perhaps from Greek bassōn deeper |
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