|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 be begun; 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.||See also Lewis base a chemical compound that combines with an acid to form a salt and water. A solution of 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|
|8.||biochem 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|
|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|
|a. the lowest division of a building or structure|
|b. the lower part of a column or pier|
|14.||another word for baseline|
|15.||the lower side or face of a geometric construction|
|a. See place-value the number of distinct single-digit numbers in a counting system, and so the number represented as 10 in a place-value system: the binary system has two digits, 0 and 1, and 10 to base two represents 2|
|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.||logic, maths Also called: base clause the initial element of a recursive definition, that defines the first element of the infinite sequence generated thereby|
|a. a root or stem|
|b. See base component|
|19.||electronics the region in a transistor between the emitter and collector|
|20.||photog 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.||informal (US), (Canadian) get to first base to accomplish the first stage in a project or a series of objectives|
|27.||informal (US), (Canadian) off base wrong or badly mistaken|
|28.||touch base to make contact|
|—vb (often foll by at |
|30.||to station, post, or place (a person or oneself)|
|[C14: from Old French, from Latin basis pedestal; see |
|1.||devoid of honour or morality; ignoble; contemptible|
|2.||of inferior quality or value|
|3.||debased; alloyed; counterfeit: base currency|
|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|
|7.||music an obsolete spelling of bass|
|[C14: from Old French bas, from Late Latin bassus of low height, perhaps from Greek bassōn deeper]|
The part of an organ nearest its point of attachment.
A fundamental ingredient; a chief constituent of a mixture.
Any of a large class of compounds, including the hydroxides and oxides of metals, having a bitter taste, a slippery solution, the capacity to turn litmus blue, and to react with acids to form salts.
A molecular or ionic substance capable of combining with a proton to form a new substance. Also called Brønsted base.
A nitrogen-containing organic compound that combines in such a manner.
A substance that provides a pair of electrons for a covalent bond with an acid.
|base (bās) Pronunciation Key
Any of a number of bitter-tasting, caustic materials. Technically, a material that produces negative ions in solution. A base is the opposite of an acid and has a pH of 7 to 14. A given amount of a base added to the same amount of an acid neutralizes the acid; water and a salt are produced. Alkalis are bases; ammonia is a common base.
touch base with
Make contact or renew communications with, as in I'll try to touch base with you when I'm in Ohio, or The candidate touched base with every ethnic group in the city. This idiom comes from baseball, where a runner must touch each base without being tagged before a run can be scored.