approximantn.

Brit.

/əˈprɒksᵻm(ə)nt/, U.S.

/əˈprɑksəm(ə)nt/

Origin: Formed within English, by derivation. Etymons: approximate v., -ant suffix¹.

Etymology: < approxim- (in approximate v.) + -ant suffix¹, after discriminant n., interpolant n., etc. Compare earlier approximant adj.

1. Mathematics. An approximation to the solution of a given problem (whether a function, a series, etc.).

ΚΠ

1903 E. B. Van Vleck in Trans. Amer. Math. Soc. 4 325 Such a fraction I shall term an approximant and denote by Upg/Vpq. Padé arranges all the approximants in a table of double entry.

1956 F. B. Hildebrand Introd. Numerical Anal. ix. 396 Since (9.99) is an identity..terminating the fraction with a_n..will give a function r_{n + 1}(x)... The result of this termination may be called the (n + 1)th convergent (or approximant).

1995 Ann. Appl. Probability 5 1 Taking an upper Riemann approximant and using the fact that the renewal measure is uniformly bounded on intervals of fixed length shows that [etc.].

2. Phonetics. A sound produced by the frictionless passage of breath through a narrow opening between two articulators, as in the English consonants r and w, formed by bringing the tongue and lips close without actually touching.

ΚΠ

1964 P. Ladefoged Phonetic Study W. Afr. Lang. vi. 25 The term approximant is used here to describe a sound which belongs to the phonetic class vocoid or central resonant oral, and simultaneously to the phonological class consonant in that it occurs in the same phonotactic patterns as stops, fricatives and nasals.

1982 J. C. Wells Accents of English i. 75 Most accents use a post-alveolar or retroflex approximant for intervocalic /r/ in words such as very.

1997 D. Crystal Dict. Linguistics & Phonetics (ed. 4) 24 In some analyses, [h] would also be considered an approximant (i.e. the voiceless equivalent of the vowel following).

This is a new entry (OED Third Edition, September 2001; most recently modified version published online December 2021).

† approximantadj.

Etymology: < Latin approximānt-em present participle of approximāre : see approximate adj.

Obsolete. rare.

Approaching closely, resembling.

ΘΚΠ

the world > relative properties > relationship > similarity > [adjective] > approximating or approaching

approximant1641

approximate1646

proximate1657

near1685

proximal1727

nudging1796

warm1860

approaching1874

1641 E. Dering Coll. Speeches on Relig. 21 June (1642) Whereby our times might be approximant, and conformant to the Apostolicall..Church.

This entry has not yet been fully updated (first published 1885; most recently modified version published online June 2021).

单词	approximant
释义	approximantn. Brit. /əˈprɒksᵻm(ə)nt/, U.S. /əˈprɑksəm(ə)nt/ Origin: Formed within English, by derivation. Etymons: approximate v., -ant suffix¹. Etymology: < approxim- (in approximate v.) + -ant suffix¹, after discriminant n., interpolant n., etc. Compare earlier approximant adj. 1. Mathematics. An approximation to the solution of a given problem (whether a function, a series, etc.). ΚΠ 1903 E. B. Van Vleck in Trans. Amer. Math. Soc. 4 325 Such a fraction I shall term an approximant and denote by Upg/Vpq. Padé arranges all the approximants in a table of double entry. 1956 F. B. Hildebrand Introd. Numerical Anal. ix. 396 Since (9.99) is an identity..terminating the fraction with a_n..will give a function r_{n + 1}(x)... The result of this termination may be called the (n + 1)th convergent (or approximant). 1995 Ann. Appl. Probability 5 1 Taking an upper Riemann approximant and using the fact that the renewal measure is uniformly bounded on intervals of fixed length shows that [etc.]. 2. Phonetics. A sound produced by the frictionless passage of breath through a narrow opening between two articulators, as in the English consonants r and w, formed by bringing the tongue and lips close without actually touching. ΚΠ 1964 P. Ladefoged Phonetic Study W. Afr. Lang. vi. 25 The term approximant is used here to describe a sound which belongs to the phonetic class vocoid or central resonant oral, and simultaneously to the phonological class consonant in that it occurs in the same phonotactic patterns as stops, fricatives and nasals. 1982 J. C. Wells Accents of English i. 75 Most accents use a post-alveolar or retroflex approximant for intervocalic /r/ in words such as very. 1997 D. Crystal Dict. Linguistics & Phonetics (ed. 4) 24 In some analyses, [h] would also be considered an approximant (i.e. the voiceless equivalent of the vowel following). This is a new entry (OED Third Edition, September 2001; most recently modified version published online December 2021). † approximantadj. Etymology: < Latin approximānt-em present participle of approximāre : see approximate adj. Obsolete. rare. Approaching closely, resembling. ΘΚΠ the world > relative properties > relationship > similarity > [adjective] > approximating or approaching approximant1641 approximate1646 proximate1657 near1685 proximal1727 nudging1796 warm1860 approaching1874 1641 E. Dering Coll. Speeches on Relig. 21 June (1642) Whereby our times might be approximant, and conformant to the Apostolicall..Church. This entry has not yet been fully updated (first published 1885; most recently modified version published online June 2021). < n.1903adj.1641
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