perturbationaladj.

Brit.

/ˌpəːtəˈbeɪʃn̩(ə)l/, U.S.

/ˌpərdərˈbeɪʃ(ə)nəl/

Origin: Formed within English, by derivation. Etymons: perturbation n., -al suffix¹.

Etymology: < perturbation n. + -al suffix¹.

Chiefly Physics.

Of, relating to, or involving perturbation (perturbation n. 4a, 4b).

ΘΚΠ

the world > the universe > heavenly body > movement of heavenly bodies > [adjective] > deviation

perturbational1834

perturbed1879

1834 Philos. Trans. (Royal Soc.) 124 304 The three intermediate integrals (E⁷) of the motion of a binary system may therefore be adapted rigorously to the case of a multiple system, by first adding to the time t the perturbational term (D⁷).

1849 J. F. W. Herschel Outl. Astron. Pref. 5 That very delicate and obscure part of the perturbational theory.

1881 Athenæum No. 2811. 343/1 A perturbational inequality of two hundred and forty years period in the motions of the earth and Venus.

1952 Proc. National Acad. Sci. U.S.A. 38 149 The first successful explanation of this stability was the first-order perturbational atomic treatment of Heitler and London.

1995 Jrnl. Chem. Physics 103 8043/1 A second..approach is to consider that the interaction energy is the result of a very small physical perturbation of the isolated monomers and thus to employ some kind of perturbational method.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	perturbational
释义	perturbationaladj. Brit. /ˌpəːtəˈbeɪʃn̩(ə)l/, U.S. /ˌpərdərˈbeɪʃ(ə)nəl/ Origin: Formed within English, by derivation. Etymons: perturbation n., -al suffix¹. Etymology: < perturbation n. + -al suffix¹. Chiefly Physics. Of, relating to, or involving perturbation (perturbation n. 4a, 4b). ΘΚΠ the world > the universe > heavenly body > movement of heavenly bodies > [adjective] > deviation perturbational1834 perturbed1879 1834 Philos. Trans. (Royal Soc.) 124 304 The three intermediate integrals (E⁷) of the motion of a binary system may therefore be adapted rigorously to the case of a multiple system, by first adding to the time t the perturbational term (D⁷). 1849 J. F. W. Herschel Outl. Astron. Pref. 5 That very delicate and obscure part of the perturbational theory. 1881 Athenæum No. 2811. 343/1 A perturbational inequality of two hundred and forty years period in the motions of the earth and Venus. 1952 Proc. National Acad. Sci. U.S.A. 38 149 The first successful explanation of this stability was the first-order perturbational atomic treatment of Heitler and London. 1995 Jrnl. Chem. Physics 103 8043/1 A second..approach is to consider that the interaction energy is the result of a very small physical perturbation of the isolated monomers and thus to employ some kind of perturbational method. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < adj.1834
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