Download the app
educalingo
Search

Meaning of "semiempirical" in the English dictionary

Dictionary
DICTIONARY
section

PRONUNCIATION OF SEMIEMPIRICAL

semiempirical  [ˌsɛmɪɪmˈpɪrɪkəl] play
facebooktwitterpinterestwhatsapp

GRAMMATICAL CATEGORY OF SEMIEMPIRICAL

noun
adjective
verb
adverb
pronoun
preposition
conjunction
determiner
exclamation
Semiempirical is an adjective.
The adjective is the word that accompanies the noun to determine or qualify it.

WHAT DOES SEMIEMPIRICAL MEAN IN ENGLISH?

Semi-empirical quantum chemistry method

Semi-empirical quantum chemistry methods are based on the Hartree–Fock formalism, but make many approximations and obtain some parameters from empirical data. They are very important in computational chemistry for treating large molecules where the full Hartree–Fock method without the approximations is too expensive. The use of empirical parameters appears to allow some inclusion of electron correlation effects into the methods. Within the framework of Hartree–Fock calculations, some pieces of information are sometimes approximated or completely omitted. In order to correct for this loss, semi-empirical methods are parametrized, that is their results are fitted by a set of parameters, normally in such a way as to produce results that best agree with experimental data, but sometimes to agree with ab initio results. Semi-empirical methods follow what are often called empirical methods where the two-electron part of the Hamiltonian is not explicitly included. For π-electron systems, this was the Hückel method proposed by Erich Hückel. For all valence electron systems, the extended Hückel method was proposed by Roald Hoffmann.

Definition of semiempirical in the English dictionary

The definition of semiempirical in the dictionary is partly empirical.

WORDS THAT RHYME WITH SEMIEMPIRICAL


asymmetrical
ˌeɪsɪˈmɛtrɪkəl
clerical
ˈklɛrɪkəl
cylindrical
sɪˈlɪndrɪkəl
electrical
ɪˈlɛktrɪkəl
empirical
ɛmˈpɪrɪkəl
historical
hɪˈstɒrɪkəl
lyrical
ˈlɪrɪkəl
metempirical
ˌmɛtɛmˈpɪrɪkəl
nonempirical
ˌnɒnɪmˈpɪrɪkəl
numerical
njuːˈmɛrɪkəl
panegyrical
ˌpænɪˈdʒɪrɪkəl
satirical
səˈtɪrɪkəl
satyrical
səˈtɪrɪkəl
spagyrical
spəˈdʒɪrɪkəl
spherical
ˈsfɛrɪkəl
symmetrical
sɪˈmɛtrɪkəl
theatrical
θɪˈætrɪkəl
unempirical
ˌʌnɪmˈpɪrɪkəl
unlyrical
ʌnˈlɪrɪkəl
unsatirical
ˌʌnsəˈtɪrɪkəl

WORDS THAT BEGIN LIKE SEMIEMPIRICAL

semidivine
semidocumentary
semidome
semidomed
semidominant
semidry
semidwarf
semidwarves
semie
semielliptical
semierect
semievergreen
semifeudal
semifinal
semifinalist
semifinished
semifit
semifitted
semifluid
semifluidic

WORDS THAT END LIKE SEMIEMPIRICAL

ahistorical
allegorical
alphanumerical
anticlerical
aspherical
bioelectrical
biometrical
categorical
chemical
chimerical
diametrical
hemispherical
hysterical
metaphorical
metrical
obstetrical
oratorical
prehistorical
rhetorical
unhistorical
unsymmetrical

Synonyms and antonyms of semiempirical in the English dictionary of synonyms

SYNONYMS

Translation of «semiempirical» into 25 languages

TRANSLATOR
online translator

TRANSLATION OF SEMIEMPIRICAL

Find out the translation of semiempirical to 25 languages with our English multilingual translator.
The translations of semiempirical from English to other languages presented in this section have been obtained through automatic statistical translation; where the essential translation unit is the word «semiempirical» in English.

Translator English - Chinese

半经验
1,325 millions of speakers

Translator English - Spanish

semiempírica
570 millions of speakers

English

semiempirical
510 millions of speakers

Translator English - Hindi

semiempirical
380 millions of speakers
ar

Translator English - Arabic

semiempirical
280 millions of speakers

Translator English - Russian

полуэмпирическая
278 millions of speakers

Translator English - Portuguese

semiempírico
270 millions of speakers

Translator English - Bengali

semiempirical
260 millions of speakers

Translator English - French

semi-empirique
220 millions of speakers

Translator English - Malay

Semiempirical
190 millions of speakers

Translator English - German

semiempirischer
180 millions of speakers

Translator English - Japanese

半経験的な
130 millions of speakers

Translator English - Korean

반 경험적
85 millions of speakers

Translator English - Javanese

Semiempirical
85 millions of speakers
vi

Translator English - Vietnamese

semiempirical
80 millions of speakers

Translator English - Tamil

semiempirical
75 millions of speakers

Translator English - Marathi

सिमीएम्पिकल
75 millions of speakers

Translator English - Turkish

Yarı-ampirik
70 millions of speakers

Translator English - Italian

semiempirico
65 millions of speakers

Translator English - Polish

półempiryczne
50 millions of speakers

Translator English - Ukrainian

напівемпірична
40 millions of speakers

Translator English - Romanian

semiempirice
30 millions of speakers
el

Translator English - Greek

semiempirical
15 millions of speakers
af

Translator English - Afrikaans

semiempirical
14 millions of speakers
sv

Translator English - Swedish

semiempiriska
10 millions of speakers
no

Translator English - Norwegian

semiempirical
5 millions of speakers

Trends of use of semiempirical

TRENDS

TENDENCIES OF USE OF THE TERM «SEMIEMPIRICAL»

The term «semiempirical» is regularly used and occupies the 75.919 position in our list of most widely used terms in the English dictionary.
0
100%
FREQUENCY
Regularly used
65
/100
The map shown above gives the frequency of use of the term «semiempirical» in the different countries.
Principal search tendencies and common uses of semiempirical
List of principal searches undertaken by users to access our English online dictionary and most widely used expressions with the word «semiempirical».

FREQUENCY OF USE OF THE TERM «SEMIEMPIRICAL» OVER TIME

The graph expresses the annual evolution of the frequency of use of the word «semiempirical» during the past 500 years. Its implementation is based on analysing how often the term «semiempirical» appears in digitalised printed sources in English between the year 1500 and the present day.

Examples of use in the English literature, quotes and news about semiempirical

EXAMPLES

10 ENGLISH BOOKS RELATING TO «SEMIEMPIRICAL»

Discover the use of semiempirical in the following bibliographical selection. Books relating to semiempirical and brief extracts from same to provide context of its use in English literature.
1
A semiempirical life
This volume is an autobiography of Michael Dewar, eminent developer of the semi-empirical method of theoretical/computational chemistry.
Michael James Steuart Dewar, 1992
2
Computational Chemistry: Introduction to the Theory and ...
M.J.S. Dewar, A Semiempirical Life, 1992 Abstract Semiempirical quantum mechanical calculations are based on the Schr€odinger equation. This chapter deals with SCF semiempirical methods, in which repeated diagonalization of the Fock ...
Errol Lewars, 2010
3
Computational Chemistry: A Practical Guide for Applying ...
4 Semiempirical Methods Semiempirical calculations are set up with the same general structure as a HF calculation in that they have a Hamiltonian and a wave function. Within this framework, certain pieces of information are approximated or  ...
David Young, 2004
4
Computational Chemistry and Molecular Modeling: Principles ...
Semiempirical calculations are much faster than their ab initio counterparts. Their results, however, can be very wrong if the molecule being computed is not similar enough to the molecules in the database used to parameterize the method.
K. I. Ramachandran, Gopakumar Deepa, Krishnan Namboori, 2008
5
Computational Medicinal Chemistry for Drug Discovery
Several methods to reduce this effort have been developed for semiempirical methods (since they experienced this difficulty much earlier than first-principles methods). Stewart et al. [145] proposed a simplified diagonalization procedure based ...
Patrick Bultinck, Hans De Winter, Wilfried Langenaeker, 2003
6
Theory and Applications of Computational Chemistry: The ...
We shall only list some methodological issues that had to be resolved in the development of semiempirical QM/MM methods. These include the choice of a proper QM/MM coupling scheme [105] (mechanical, electronic, polarized, ...
Clifford Dykstra, Gernot Frenking, Kwang Kim, 2011
7
Non-covalent Interactions: Theory and Experiment
In the case of semiempirical QM methods the situation is even more difficult since here some portion of the correlation energy (via empirical parameters) is covered . The first attempt to include the dispersion energy into semiempirical QM ...
Pavel Hobza, Klaus Müller-Dethlefs, 2010
8
Advances in Chemical Physics, New Methods in Computational ...
Whenever such calculations provide a realistic description, the underlying semiempirical model can be used for explaining and predicting chemical behavior in terms of simple qualitative concepts. Current developments in semiempirical ...
I. Prigogine, Stuart A. Rice, 2009
9
Computational Modeling of Polymers
In this case, one generally uses semiempirical methods to evaluate the rest of the integrals from experimental data and thus to correct the errors introduced by the neglect of the noncalculated integrals. In general, semiempirical methods are ...
Jozef Bicerano, 1992
10
Genetic Algorithms and Genetic Programming for Multiscale ...
5.3.8 Semiempirical parameter interactions The multiobjective optimization of the semiempirical parameters for ethylene resulted in 61 different optimal parameter sets. Figure 5.16 depicts the histogram of the deviation of the 11 semiempirical ...
Kumara Narasimha Sastry, 2007

NEWS ITEMS WHICH INCLUDE THE TERM «SEMIEMPIRICAL»

Find out what the national and international press are talking about and how the term semiempirical is used in the context of the following news items.
1
Quantum Mechanical/Molecular Mechanical Studies on Spectral …
In semiempirical QM methods, many terms in the ab initio formalism are neglected and many others are taken from experiment or calibrated against reliable ... «RedOrbit, Aug 08»

REFERENCE
« EDUCALINGO. Semiempirical [online]. Available <https://educalingo.com/en/dic-en/semiempirical>. Apr 2024 ».
Download the educalingo app
en
English dictionary
Discover all that is hidden in the words on
index
a b c d e f g h i j k l m n o p q r s t u v w x y z