osculantadj.n.

Brit.

/ˈɒskjᵿlənt/, U.S.

/ˈɑskjəl(ə)nt/

Origin: A borrowing from Latin. Etymons: Latin ōsculant-, ōsculāns, ōsculārī.

Etymology: < classical Latin ōsculant-, ōsculāns, present participle of ōsculārī osculate v.

A. adj.

†1. Biology. Situated between and connecting two groups of organisms (represented by osculating circles in the quinary system of classification of MacLeay); intermediate. Obsolete.

ΘΚΠ

the world > life > biology > taxonomy > taxon > [adjective] > intermediate

osculant1819

intercalary1877

1819 W. S. MacLeay Horæ Entomologicæ i. 37 These genera I propose to call osculantia, from their occurring as it were at the point where the circles touch one another.]

1819 W. S. MacLeay Horæ Entomologicæ i. ix. 91 It is to be observed that no account is made here of osculant genera.

1825 Trans. Linn. Soc. 14 410 At present it [sc. Podarges] remains osculant between the two families, and may decidedly be pronounced the immediate passage from the Birds of Prey to the Perchers.

1826 W. Kirby & W. Spence Introd. Entomol. IV. 234 The internal sense..is osculant between intellect and sense.

1840 N. Amer. Rev. Apr. 383 In groups which form the passage between neighbouring groups of higher denomination than themselves, the pleasing name of osculant is applied.

1873 G. Henslow Evolution i. 7 Forms..intermediate to other forms hitherto well distinct—‘osculant’ or intercalary forms as they are called.

1887 Amer. Naturalist 21 582 He divides the sponges into two great groups, Calcarea and Non-Calcarea, maintaining that the two are perfectly distinct, and that there are no osculant forms.

2. Kissing; suggestive of kissing. rare.

ΘΚΠ

the mind > emotion > love > kiss > [adjective] > that kisses

kissing1600

osculant1850

1850 J. Ogilvie Imperial Dict. III. 290/3 Osculant, kissing.

2001 Time (Nexis) 16 Apr. 54 They pour it on—warm, succulent, osculant, shadowy love.

3. Geometry. Of a curve or surface: that osculates another curve or surface; = osculating adj.

ΘΚΠ

the world > relative properties > number > geometry > curve > [adjective] > osculating

osculatory1753

osculating1816

oscular1869

osculant1879

1879 Philos. Trans. 1878 (Royal Soc.) 169 668 We obtain the equation to the osculant (n−1)flat at the point t.

1929 Amer. Jrnl. Math. 51 466 This is the osculant line of Cⁿ.

B. n.

Geometry. A curve or surface that osculates another curve or surface. See osculate v. 3.

ΘΚΠ

the world > relative properties > number > geometry > curve > [noun] > touching

osculation1798

tactinvariant1856

superosculation1876

osculant1879

1879 Philos. Trans. 1878 (Royal Soc.) 169 675 If the arbitrary (n−k−1)flat meet the curve in more points than one, k of the osculants will coincide at each of them.

1939 Amer. Jrnl. Math. 61 127 We saw that the four circles..are osculants of the limaçon.

1996 Math. of Computation 65 891 Rational cubic splines are treated from the projective viewpoint in Chapter 9, with second-order smoothness imposed by use of the osculants.

This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022).

单词	osculant
释义	osculantadj.n. Brit. /ˈɒskjᵿlənt/, U.S. /ˈɑskjəl(ə)nt/ Origin: A borrowing from Latin. Etymons: Latin ōsculant-, ōsculāns, ōsculārī. Etymology: < classical Latin ōsculant-, ōsculāns, present participle of ōsculārī osculate v. A. adj. †1. Biology. Situated between and connecting two groups of organisms (represented by osculating circles in the quinary system of classification of MacLeay); intermediate. Obsolete. ΘΚΠ the world > life > biology > taxonomy > taxon > [adjective] > intermediate osculant1819 intercalary1877 1819 W. S. MacLeay Horæ Entomologicæ i. 37 These genera I propose to call osculantia, from their occurring as it were at the point where the circles touch one another.] 1819 W. S. MacLeay Horæ Entomologicæ i. ix. 91 It is to be observed that no account is made here of osculant genera. 1825 Trans. Linn. Soc. 14 410 At present it [sc. Podarges] remains osculant between the two families, and may decidedly be pronounced the immediate passage from the Birds of Prey to the Perchers. 1826 W. Kirby & W. Spence Introd. Entomol. IV. 234 The internal sense..is osculant between intellect and sense. 1840 N. Amer. Rev. Apr. 383 In groups which form the passage between neighbouring groups of higher denomination than themselves, the pleasing name of osculant is applied. 1873 G. Henslow Evolution i. 7 Forms..intermediate to other forms hitherto well distinct—‘osculant’ or intercalary forms as they are called. 1887 Amer. Naturalist 21 582 He divides the sponges into two great groups, Calcarea and Non-Calcarea, maintaining that the two are perfectly distinct, and that there are no osculant forms. 2. Kissing; suggestive of kissing. rare. ΘΚΠ the mind > emotion > love > kiss > [adjective] > that kisses kissing1600 osculant1850 1850 J. Ogilvie Imperial Dict. III. 290/3 Osculant, kissing. 2001 Time (Nexis) 16 Apr. 54 They pour it on—warm, succulent, osculant, shadowy love. 3. Geometry. Of a curve or surface: that osculates another curve or surface; = osculating adj. ΘΚΠ the world > relative properties > number > geometry > curve > [adjective] > osculating osculatory1753 osculating1816 oscular1869 osculant1879 1879 Philos. Trans. 1878 (Royal Soc.) 169 668 We obtain the equation to the osculant (n−1)flat at the point t. 1929 Amer. Jrnl. Math. 51 466 This is the osculant line of Cⁿ. B. n. Geometry. A curve or surface that osculates another curve or surface. See osculate v. 3. ΘΚΠ the world > relative properties > number > geometry > curve > [noun] > touching osculation1798 tactinvariant1856 superosculation1876 osculant1879 1879 Philos. Trans. 1878 (Royal Soc.) 169 675 If the arbitrary (n−k−1)flat meet the curve in more points than one, k of the osculants will coincide at each of them. 1939 Amer. Jrnl. Math. 61 127 We saw that the four circles..are osculants of the limaçon. 1996 Math. of Computation 65 891 Rational cubic splines are treated from the projective viewpoint in Chapter 9, with second-order smoothness imposed by use of the osculants. This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022). < adj.n.1819
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