ocellusn.

Brit.

/ə(ʊ)ˈsɛləs/,

/ɒˈsɛləs/, U.S.

/oʊˈsɛləs/

Inflections: Plural ocelli.

Origin: A borrowing from Latin. Etymon: Latin ocellus.

Etymology: < classical Latin ocellus little eye < oculus eye (see oculus n.) + -ellus -ellus suffix. Compare French ocelle (1825 in sense ‘simple eye of an insect’ (compare sense 1), 1840 in sense ‘round marking on the body of an animal’ (compare sense 2)).

1. Zoology.

a. Any of various kinds of simple eye or light-sensitive organ found in invertebrates, typically consisting of a number of sensory cells with or without an associated lens; (also) spec. each of the three simple dorsal eyes of an insect (as distinct from a compound eye).

ΘΚΠ

the world > animals > invertebrates > bodies or parts > [noun] > eye

eye1601

ocellus1819

stemma1826

the world > animals > invertebrates > phylum Arthropoda > [noun] > member of > parts of > eye

ocellus1819

1819 G. Samouelle Entomologist's Compend. 273 Ocelli or stemmata not distinct.

1863 H. W. Bates Naturalist on River Amazons I. i. 31 They [sc. worker ants] have in the middle of the forehead a twin ocellus, or simple eye, of quite different structure from the ordinary compound eyes, on the sides of the head.

1879 G. Allen Colour-sense iii. 27 The simplest form in which they [sc. visual organs] occur is that of the ocelli among naked-eyed Medusæ.

1901 E. Step Shell Life v. 62 Towards the hinder margin of the whitish mantle there is a number of closely grouped ocelli—dark spots that are not true eyes but which are so sensitive to changes in the intensity of light that they serve the same purpose.

1953 H. Mellanby Animal Life in Fresh Water (ed. 5) viii. 118 Their eyes are the simple pigment spots known as ocelli. Compound eyes are never present.

1976 T. Hooper Guide to Bees & Honey i. i. 12 The eyes are of two kinds: two large compound eyes which are the main organs of vision and, on top of the head, three simple eyes, or ocelli, which are probably monitors of light intensity.

1990 Sci. Amer. Apr. 67/1 Two small eyes on top of the crab, the median ocelli, send additional signals to the brain that increase the strength of the circadian response depending on the amount of ultraviolet light in the sky at night.

†b. A facet or segment of a compound eye; an ommatidium. Obsolete. rare.

ΘΚΠ

the world > animals > invertebrates > phylum Arthropoda > class Insecta > order Diptera or flies > [noun] > member of > parts of > facet of compound eye

ocellus1869

1869 H. Ussher in Eng. Mech. 3 Dec. 271/3 Catch your fly..and with a lens you will see his ocular organ divided into numerous facets or ocelli.

2. Chiefly Zoology. A coloured spot surrounded by a ring or rings of different colour, as found on some feathers, butterflies' wings, etc.; an eyespot.

ΘΚΠ

the world > animals > animal body > markings or colourings > [noun] > spotted marking > eye-like spot

oculus1797

eyespot1798

ocellus1826

eyemark1844

1826 W. Kirby & W. Spence Introd. Entomol. IV. 286 Ocellus, an eye-like spot in the Wings of many Lepidoptera, consisting of annuli of different colours, inclosing a central spot or pupil.

1871 C. Darwin Descent of Man I. xi. 397 The lower surface [of a moth's wing] is magnificently ornamented by an ocellus of cobalt-blue.

1965 P. Wayre Wind in Reeds xv. 216 Each feather..has a chain of superb ocelli set like precious stones along its entire length.

1995 J. S. Ryland in P. J. Hayward & J. S. Ryland Handbk. Marine Fauna N.W. Europe xiv. 722/2 Skates and Rays... A prominent black and yellow ocellus (round marking) approximately in the centre of the upperside of each wing.

2001 Bird Keeper Feb. 34/3 It is not until the third year that the birds become mature and the ocelli are acquired.

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

单词	ocellus
释义	ocellusn. Brit. /ə(ʊ)ˈsɛləs/, /ɒˈsɛləs/, U.S. /oʊˈsɛləs/ Inflections: Plural ocelli. Origin: A borrowing from Latin. Etymon: Latin ocellus. Etymology: < classical Latin ocellus little eye < oculus eye (see oculus n.) + -ellus -ellus suffix. Compare French ocelle (1825 in sense ‘simple eye of an insect’ (compare sense 1), 1840 in sense ‘round marking on the body of an animal’ (compare sense 2)). 1. Zoology. a. Any of various kinds of simple eye or light-sensitive organ found in invertebrates, typically consisting of a number of sensory cells with or without an associated lens; (also) spec. each of the three simple dorsal eyes of an insect (as distinct from a compound eye). ΘΚΠ the world > animals > invertebrates > bodies or parts > [noun] > eye eye1601 ocellus1819 stemma1826 the world > animals > invertebrates > phylum Arthropoda > [noun] > member of > parts of > eye ocellus1819 1819 G. Samouelle Entomologist's Compend. 273 Ocelli or stemmata not distinct. 1863 H. W. Bates Naturalist on River Amazons I. i. 31 They [sc. worker ants] have in the middle of the forehead a twin ocellus, or simple eye, of quite different structure from the ordinary compound eyes, on the sides of the head. 1879 G. Allen Colour-sense iii. 27 The simplest form in which they [sc. visual organs] occur is that of the ocelli among naked-eyed Medusæ. 1901 E. Step Shell Life v. 62 Towards the hinder margin of the whitish mantle there is a number of closely grouped ocelli—dark spots that are not true eyes but which are so sensitive to changes in the intensity of light that they serve the same purpose. 1953 H. Mellanby Animal Life in Fresh Water (ed. 5) viii. 118 Their eyes are the simple pigment spots known as ocelli. Compound eyes are never present. 1976 T. Hooper Guide to Bees & Honey i. i. 12 The eyes are of two kinds: two large compound eyes which are the main organs of vision and, on top of the head, three simple eyes, or ocelli, which are probably monitors of light intensity. 1990 Sci. Amer. Apr. 67/1 Two small eyes on top of the crab, the median ocelli, send additional signals to the brain that increase the strength of the circadian response depending on the amount of ultraviolet light in the sky at night. †b. A facet or segment of a compound eye; an ommatidium. Obsolete. rare. ΘΚΠ the world > animals > invertebrates > phylum Arthropoda > class Insecta > order Diptera or flies > [noun] > member of > parts of > facet of compound eye ocellus1869 1869 H. Ussher in Eng. Mech. 3 Dec. 271/3 Catch your fly..and with a lens you will see his ocular organ divided into numerous facets or ocelli. 2. Chiefly Zoology. A coloured spot surrounded by a ring or rings of different colour, as found on some feathers, butterflies' wings, etc.; an eyespot. ΘΚΠ the world > animals > animal body > markings or colourings > [noun] > spotted marking > eye-like spot oculus1797 eyespot1798 ocellus1826 eyemark1844 1826 W. Kirby & W. Spence Introd. Entomol. IV. 286 Ocellus, an eye-like spot in the Wings of many Lepidoptera, consisting of annuli of different colours, inclosing a central spot or pupil. 1871 C. Darwin Descent of Man I. xi. 397 The lower surface [of a moth's wing] is magnificently ornamented by an ocellus of cobalt-blue. 1965 P. Wayre Wind in Reeds xv. 216 Each feather..has a chain of superb ocelli set like precious stones along its entire length. 1995 J. S. Ryland in P. J. Hayward & J. S. Ryland Handbk. Marine Fauna N.W. Europe xiv. 722/2 Skates and Rays... A prominent black and yellow ocellus (round marking) approximately in the centre of the upperside of each wing. 2001 Bird Keeper Feb. 34/3 It is not until the third year that the birds become mature and the ocelli are acquired. This entry has been updated (OED Third Edition, March 2004; most recently modified version published online June 2022). < n.1819
随便看	kumyk kunai kunbi kunckel's phosphorus kund kundalini kundalini yoga kundalinis kung fu kung fu kick kung fu master kung fu movie kungu kungu cake kunst kunstforscher kunstforschung kunstgeschichte kunsthistoriker kunstlied kunstprosa kunzite kunzites kuo-yü kuomintang