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1. Dictionary

   Base

   /bās/

   

   noun

   • 1. the lowest part or edge of something, especially the part on which it rests or is supported: "she sat down at the base of a tree" Similar foundationbottomfootsupportpropstaystandpedestalplinthrestbedsubstructureOpposite top
   • ▪ the part of a column between the shaft and pedestal or pavement.
   • ▪ the end at which a part or organ is attached to the trunk or main part: "a shoot is produced at the base of the stem"
   • ▪ a line or surface on which a figure is regarded as standing: "the base of the triangle"
   • ▪ a line of known length used in triangulation.
   • ▪ the lowest part of a shield.
   • 2. a conceptual structure or entity on which something draws or depends: "the town's economic base collapsed"
   • ▪ something used as a foundation or starting point for further work; a basis: "uses existing data as the base for the study" Similar basisbedrockfoundationcoreessenceessentialnitty-grittybasicsstarting pointkey componentfundamentalroot(s)heartbackbonetheoryprinciplerationalesourceoriginspringwell headfountainheadfount
   • ▪ a group of people regarded as supporting an organization, for example by buying its products: "a client base"
   • 3. a place used as a center of operations by the armed forces or others; a headquarters: "the corporal headed back to base" Similar headquarterscenterstarting pointcampsitestationsettlementpost
   • ▪ the main place where a person works or stays: "she makes the studio her base"
   • 4. a main or important element or ingredient to which other things are added: "soaps with a vegetable oil base" Similar mediumvehiclecarrier
   • ▪ a substance such as water or oil into which a pigment is mixed to form paint.
   • ▪ a substance used as a foundation for makeup: "her makeup artist works with base, eye makeup, and lipstick"
   • 5. a substance capable of reacting with an acid to form a salt and water, or (more broadly) of accepting or neutralizing hydrogen ions.
   • ▪ a purine or pyrimidine group in a nucleotide or nucleic acid.
   • 6. the middle part of a bipolar transistor, separating the emitter from the collector.
   • 7. the root or stem of a word or a derivative.
   • ▪ the uninflected form of a verb.
   • 8. a number used as the basis of a numeration scale.
   • ▪ a number in terms of which other numbers are expressed as logarithms.
   • 9. one of the four stations that must be reached in turn to score a run.
   • ▪ used to refer to progressive levels of sexual intimacy: informal "she and her boyfriend got to second base"

   verb

   • 1. have as the foundation for (something); use as a point from which (something) can develop: "the film is based on a novel by Pat Conroy" Similar foundbuildconstructformestablishgroundrootuse as a basisresthingeemanate fromderive fromspring fromstem fromoriginate inhave its origin incan be traced back to
   • 2. situate as the center of operations: "a London-based band" Similar locatestationsituatepostpositionplaceinstalldeploysiteestablishgarrison

   Word Origin Middle English: from Old French, from Latin basis ‘base, pedestal’, from Greek.

   Scrabble Points: 6

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2. www.khanacademy.org › a › arrhenius-acids-and-basesArrhenius acids and bases (article) | Khan Academy

   www.khanacademy.org › a › arrhenius-acids-and-bases

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   An Arrhenius base is defined as any species that increases the concentration of hydroxide ions, OH − ‍ , in aqueous solution. An example of an Arrhenius base is the highly soluble sodium hydroxide, NaOH ‍ . Sodium hydroxide dissociates in water as follows:

3. en.m.wiktionary.org › wiki › basebase - Wiktionary, the free dictionary

   en.m.wiktionary.org › wiki › base

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   Apr 23, 2024 · Noun [ edit] base ( plural bases ) A foundation or base; the bottom of a building. The foundation, base, or bottom of a column, statue, or vase. ( rare) Padding inserted below a horse's bridle. ( rare) A hand's palm; the section of a hand below the fingers. ( rare) The bottom portion of a dress.

4. mathworld.wolfram.com › BaseBase -- from Wolfram MathWorld

   mathworld.wolfram.com › Base

   • mathworld.wolfram.com
   •   › …
   •   › Special Functions
   •   › Logarithms

   Apr 25, 2024 · The word "base" in mathematics is used to refer to a particular mathematical object that is used as a building block. The most common uses are the related concepts of the number system whose digits are used to represent numbers and the number system in which logarithms are defined.

5. www.snexplores.org › article › explainer-what-are-acids-and-basesExplainer: What are acids and bases? - Science News Explores

   www.snexplores.org › article › explainer-what-are-acids-and-bases

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   Nov 13, 2019 · Its chemical formula is NH 3. You can find it in many window-cleaning products. Not to confuse you, but . . . Scientists sometimes use another scheme — the Lewis system — to define acids and bases. Instead of protons, this Lewis definition describes what molecules do with their electrons.

6. www.wordreference.com › definition › basebase - WordReference.com Dictionary of English

   www.wordreference.com › definition › base

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   base1 /beɪs/ n., adj., v., based, bas•ing. n. [ countable] the part on which something stands: The base of the lamp was made of marble. a fundamental principle; basis: data to be used as a base for further research. the principal element in a mixture: A soup with a base of chicken broth. a starting point from which something is begun.

7. dictionary.cambridge.org › essential-american-english › baseBASE | English meaning - Cambridge Essential American

   dictionary.cambridge.org › essential-american-english › base

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   the main place where a person lives or works, or from where he or she does things: The hotel is an excellent base for exploring the city. a place where people in the armed forces live and work: an American Air Force base. base. verb. us / beɪs/ present participle basing | past tense and past participle based. be based at/in.

8. byjus.com › chemistry › acids-and-basesAcids and Bases - Definition, Examples, Properties, Uses with ...

   byjus.com › chemistry › acids-and-bases

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   A base is a molecule or ion able to accept a hydrogen ion from an acid. Acidic substances are usually identified by their sour taste. An acid is basically a molecule which can donate an H + ion and can remain energetically favourable after a loss of H +. Acids are known to turn blue litmus red.