optical illusionn.

Brit.

/ˌɒptᵻkl ɪˈl(j)uːʒn/, U.S.

/ˌɑptək(ə)l ᵻˈluʒ(ə)n/

Origin: Formed within English, by compounding. Etymons: optical adj., illusion n.

Etymology: < optical adj. + illusion n. Compare French illusion optique (1798; also illusion d'optique (1756), illusion de l'optique (1761)).

The experience of seeming to see something that is other than it appears, or (more widely) that does not exist (cf. illusion n. 4a); something having an appearance so resembling something else as to deceive the eye. Also: an illusory image or hallucination seen as a result of illness. Also figurative.

ΘΚΠ

the world > physical sensation > sight and vision > thing seen > optical illusion > [noun] > an optical illusion

phantasma1398

emphasis1654

optical illusion1763

fata Morgana1818

trompe l'œil1889

1763 Philos. Trans. 1762 (Royal Soc.) 52 462 The Sun and the Moon, when they are in or near the horizon, appear..so very large in comparison with their apparent magnitudes, when they are in the zenith, that several learned men..have..pronounced this phænomenon as a mere optical illusion.

1794 R. J. Sulivan View of Nature II. xlviii. 381 In lifting our eyes to the firmament, we see all the stars, as it were, attached to the same dome. But, this is merely an optical illusion.

1825 Lancet 19 Nov. 282/1 The patient..experienced various optical illusions, such as the flashing of light before the eyes.

1859 Rep. 28th Meeting Brit. Assoc. Advancem. Sci. 1858 ii. 14 (heading) On an apparatus for exhibiting optical illusions of spectral phenomena.

1887 Cent. Mag. Nov. 93 An optical illusion attributable to the intervention of rays of light reflected from microscopic corrugations of the nacrous surface.

1911 Rep. Labour & Social Conditions in Germany (Tariff Reform League) III. 193 It may have been an optical illusion, but it certainly did seem to me that Germany was in a state of abounding prosperity.

1922 J. Joyce Ulysses ii. xiii. [Nausicaa] 359 Looks like a phantom ship. No. Wait. Trees are they? An optical illusion. Mirage.

1976 Times 20 Feb. 14/4 But it will be said, surely the growth of public spending has..been arrested... Not, alas, so. This is an optical illusion.

2002 N. Drury Dict. Esoteric 314/2 Unidentified flying objects..are usually classified as weather balloons, optical illusions, or meteorological phenomena.

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

单词	optical illusion
释义	optical illusionn. Brit. /ˌɒptᵻkl ɪˈl(j)uːʒn/, U.S. /ˌɑptək(ə)l ᵻˈluʒ(ə)n/ Origin: Formed within English, by compounding. Etymons: optical adj., illusion n. Etymology: < optical adj. + illusion n. Compare French illusion optique (1798; also illusion d'optique (1756), illusion de l'optique (1761)). The experience of seeming to see something that is other than it appears, or (more widely) that does not exist (cf. illusion n. 4a); something having an appearance so resembling something else as to deceive the eye. Also: an illusory image or hallucination seen as a result of illness. Also figurative. ΘΚΠ the world > physical sensation > sight and vision > thing seen > optical illusion > [noun] > an optical illusion phantasma1398 emphasis1654 optical illusion1763 fata Morgana1818 trompe l'œil1889 1763 Philos. Trans. 1762 (Royal Soc.) 52 462 The Sun and the Moon, when they are in or near the horizon, appear..so very large in comparison with their apparent magnitudes, when they are in the zenith, that several learned men..have..pronounced this phænomenon as a mere optical illusion. 1794 R. J. Sulivan View of Nature II. xlviii. 381 In lifting our eyes to the firmament, we see all the stars, as it were, attached to the same dome. But, this is merely an optical illusion. 1825 Lancet 19 Nov. 282/1 The patient..experienced various optical illusions, such as the flashing of light before the eyes. 1859 Rep. 28th Meeting Brit. Assoc. Advancem. Sci. 1858 ii. 14 (heading) On an apparatus for exhibiting optical illusions of spectral phenomena. 1887 Cent. Mag. Nov. 93 An optical illusion attributable to the intervention of rays of light reflected from microscopic corrugations of the nacrous surface. 1911 Rep. Labour & Social Conditions in Germany (Tariff Reform League) III. 193 It may have been an optical illusion, but it certainly did seem to me that Germany was in a state of abounding prosperity. 1922 J. Joyce Ulysses ii. xiii. [Nausicaa] 359 Looks like a phantom ship. No. Wait. Trees are they? An optical illusion. Mirage. 1976 Times 20 Feb. 14/4 But it will be said, surely the growth of public spending has..been arrested... Not, alas, so. This is an optical illusion. 2002 N. Drury Dict. Esoteric 314/2 Unidentified flying objects..are usually classified as weather balloons, optical illusions, or meteorological phenomena. This entry has been updated (OED Third Edition, June 2004; most recently modified version published online March 2022). < n.1763
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