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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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