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rational    音标拼音: [r'æʃənəl] [r'æʃnəl]
a. 理性的,合理的,推理的
n. 有理数

理性的,合理的,推理的有理数

rational
有理

rational
adj 1: consistent with or based on or using reason; "rational
behavior"; "a process of rational inference"; "rational
thought" [ant: {irrational}]
2: of or associated with or requiring the use of the mind;
"intellectual problems"; "the triumph of the rational over
the animal side of man" [synonym: {intellectual}, {rational},
{noetic}]
3: capable of being expressed as a quotient of integers;
"rational numbers" [ant: {irrational}]
4: having its source in or being guided by the intellect (as
distinguished from experience or emotion); "a rational
analysis"
n 1: an integer or a fraction [synonym: {rational number},
{rational}]

Rational \Ra"tion*al\ (r[a^]sh"[u^]n*al), a. [L. rationalis: cf.
F. rationnel. See {Ratio}, {Reason}, and cf. {Rationale}.]
1. Relating to the reason; not physical; mental.
[1913 Webster]

Moral philosophy was his chiefest end; for the
rational, the natural, and mathematics . . . were
but simple pastimes in comparison of the other.
--Sir T.
North.
[1913 Webster]

2. Having reason, or the faculty of reasoning; endowed with
reason or understanding; reasoning.
[1913 Webster]

It is our glory and happiness to have a rational
nature. --Law.
[1913 Webster]

3. Agreeable to reason; not absurd, preposterous,
extravagant, foolish, fanciful, or the like; wise;
judicious; as, rational conduct; a rational man.
[1913 Webster]

4. (Chem.) Expressing the type, structure, relations, and
reactions of a compound; graphic; -- said of formulae. See
under {Formula}.
[1913 Webster]

{Rational horizon}. (Astron.) See {Horizon}, 2
(b) .

{Rational quantity} (Alg.), one that can be expressed without
the use of a radical sign, or in exact parts of unity; --
opposed to {irrational} or {radical quantity}.

{Rational symptom} (Med.), one elicited by the statements of
the patient himself and not as the result of a physical
examination.
[1913 Webster]

Syn: Sane; sound; intelligent; reasonable; sensible; wise;
discreet; judicious.

Usage: {Rational}, {reasonable}. Rational has reference to
reason as a faculty of the mind, and is opposed to
irrational; as, a rational being, a rational state of
mind, rational views, etc. In these cases the
speculative reason is more particularly, referred to.
Reasonable has reference to the exercise of this
faculty for practical purposes, and means, governed or
directed by reason; as, reasonable desires or plans; a
reasonable charge; a reasonable prospect of success.
[1913 Webster]

What higher in her society thou find'st
Attractive, human, rational, love still.
--Milton.
[1913 Webster]

A law may be reasonable in itself, although a
man does not allow it, or does not know the
reason of the lawgivers. --Swift.
[1913 Webster]


Rational \Ra"tion*al\, n.
A rational being. --Young.
[1913 Webster]

140 Moby Thesaurus words for "rational":
acceptable, admissible, algorismic, algorithmic, aliquot,
all there, analytic, balanced, bright, calm, cardinal, cerebral,
circumspect, clear-eyed, clearheaded, clearminded, cogent,
commonsense, compos mentis, conceptive, conceptual, consequent,
cool, coolheaded, credible, decimal, differential, digital,
discriminating, discursive, down-to-earth, earthy, endopsychic,
enlightened, even, everyday, exponential, figural, figurate,
figurative, finite, fractional, hardheaded, healthy-minded,
ideational, imaginary, impair, impossible, infinite, informed,
integral, intellectual, intelligent, internal, irrational,
judicious, just, justifiable, knowing, knowledgeable, legitimate,
level-headed, levelheaded, logarithmic, logical, logometric, lucid,
matter-of-fact, mental, mentally sound, negative, noetic,
noological, normal, not so dumb, numeral, numerary, numerative,
numeric, odd, of sound mind, ordinal, pair, philosophical, phrenic,
plausible, positive, positivistic, possible, practical,
practical-minded, pragmatic, prime, prudent, psychic, psychologic,
radical, ratiocinative, ratiocinatory, real, realist, realistic,
reasonable, reasoning, reciprocal, right, sane, sane-minded,
scientific, scientistic, secular, sensible, sober, sober-minded,
sophic, sound, sound-minded, sound-thinking, spiritual, stable,
straight-thinking, strong-minded, subjective, submultiple, surd,
thinking, together, transcendental, understanding, unideal,
unidealistic, unromantic, unsentimental, well-argued,
well-balanced, well-founded, well-grounded, wholesome, wise,
worldly


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  • RATIONAL AG | Inspiringly different.
    “We strive for precision in our cooking, in our kitchens and in our restaurants, and RATIONAL has become one of those fundamental pieces of equipment that we rely on ”
  • RATIONAL Definition Meaning - Merriam-Webster
    The meaning of RATIONAL is having reason or understanding How to use rational in a sentence
  • RATIONAL Definition Meaning | Dictionary. com
    RATIONAL definition: agreeable to reason; reasonable; sensible See examples of rational used in a sentence
  • Rational Software - Wikipedia
    Rational Machines was an enterprise founded by Paul Levy and Mike Devlin in 1981 to provide tools to expand the use of modern software engineering practices, particularly explicit modular architecture and iterative development
  • Rational Acoustics
    © 2026, Rational Acoustics LLC All Rights Reserved Use of this material, including for the training of generative artificial intelligence (AI) technologies, is expressly prohibited without prior written consent
  • RATIONAL | English meaning - Cambridge Dictionary
    RATIONAL definition: 1 based on clear thought and reason: 2 (of a number) that can be expressed as the ratio of two… Learn more
  • RATIONAL Ovens: Combi Ovens, Parts, Accessories - WebstaurantStore
    Rational combi oven parts and accessories has everything you need to maintain your oven, from cleaning chemicals to replacement components Rational oven and grill cleaner allows you to cut through stuck-on grime and dirt, which can help lengthen the lifespan of your appliance
  • RATIONAL definition in American English | Collins English Dictionary
    Rational decisions and thoughts are based on reason rather than on emotion He's asking you to look at both sides of the case and come to a rational decision
  • Rational and Irrational Numbers - YouTube
    This math video tutorial provides a basic introduction into rational and irrational numbers Algebra - Free Formula Sheets: https: bit ly 3CBeZMY more
  • Using Rational Numbers - Math is Fun
    To divide two rational numbers, first flip the second number over (make it a reciprocal) and then do a multiply like above: Here is an example: We will cover Addition and Subtraction in one go, as they are the same method Before we add or subtract, the rational numbers should have the same bottom number (called a Common Denominator)





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