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pupil    音标拼音: [pj'upəl]
n. 学生,门生,未成年人,瞳孔

学生,门生,未成年人,瞳孔

pupil
n 1: a learner who is enrolled in an educational institution
[synonym: {student}, {pupil}, {educatee}]
2: the contractile aperture in the center of the iris of the
eye; resembles a large black dot
3: a young person attending school (up through senior high
school) [synonym: {schoolchild}, {school-age child}, {pupil}]

Pupil \Pu"pil\, n. [F. pupille, n. fem., L. pupilla the pupil of
the eye, originally dim. of pupa a girl. See {Puppet}, and
cf. {Pupil} a scholar.] (Anat.)
The aperture in the iris; the sight, apple, or black of the
eye. See the Note under {Eye}, and {Iris}.
[1913 Webster]

{Pin-hole pupil} (Med.), the pupil of the eye when so
contracted (as it sometimes is in typhus, or opium
poisoning) as to resemble a pin hole. --Dunglison.
[1913 Webster]


Pupil \Pu"pil\, n. [F. pupille, n. masc. & fem., L. pupillus,
pupilla, dim. of pupus boy, pupa girl. See {Puppet}, and cf.
{Pupil} of the eye.]
1. A youth or scholar of either sex under the care of an
instructor or tutor.
[1913 Webster]

Too far in years to be a pupil now. --Shak.
[1913 Webster]

Tutors should behave reverently before their pupils.
--L'Estrange.
[1913 Webster]

2. A person under a guardian; a ward. --Dryden.
[1913 Webster]

3. (Civil Law) A boy or a girl under the age of puberty, that
is, under fourteen if a male, and under twelve if a
female.
[1913 Webster]

Syn: Learner; disciple; tyro. -- See {Scholar}.
[1913 Webster]

49 Moby Thesaurus words for "pupil":
apprentice, auditor, autodidact, baby blues, banjo eyes, beginner,
bright eyes, catechumen, clear eyes, cornea, disciple, educatee,
eye, eyeball, eyelid, goggle eyes, inquirer, iris, learner, lens,
lid, monitor, naked eye, neophyte, nictitating membrane, novice,
oculus, optic, optic nerve, orb, organ of vision, peeper, popeyes,
praepostor, prefect, retina, saucer eyes, scholar, schoolboy,
schoolgirl, sclera, self-taught person, starry orbs, student,
studier, trainee, tyro, unaided eye, visual organ

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  • Pupil - Wikipedia
    The pupil is a hole located in the center of the iris of the eye that allows light to strike the retina [1] It appears black because light rays entering the pupil are either absorbed by the tissues inside the eye directly, or absorbed after diffuse reflections within the eye that mostly miss exiting the narrow pupil
  • Pupil - American Academy of Ophthalmology
    The opening at the center of the iris that allows light to enter the eye
  • Pupil - Structure, Location, Function, Anatomy, Diagram
    The pupil is the black, circular opening in the center of the eye that allows light to enter and reach the retina It appears black because most of the light entering the pupil is absorbed by the tissues inside the eye The size of the pupil changes in response to light intensity, controlled by the iris muscles that dilate or constrict it
  • Human eye - Pupil, Iris, Retina | Britannica
    The amount of light entering the eye is restricted by the aperture in the iris, the pupil In a dark room, a person’s pupils are large, perhaps 8 mm (0 3 inch) or more in diameter When the room is lighted, there is an immediate constriction of the pupils, the light reflex
  • Pupil | Iris, Optic Nerve Retina | Britannica
    Pupil, in the anatomy of the eye, the black centre opening within the iris through which light passes before reaching the lens and being focused onto the retina The size of the opening is governed by the muscles of the iris, the coloured part of the eye These muscles rapidly constrict the pupil
  • Your Pupils and Eye Disorders, Nerve Problems, Concussion - WebMD
    Pupils are the dark-colored openings at the center of your eyes that let light in Doctors can look at your pupils for clues about your health The size of your pupils and how they react to
  • Pupil | Complete Anatomy - Elsevier
    The pupil is the central aperture or opening of the iris of the eye It allows light to enter the eyeball and hit the retina Thus, the pupil appears black, since light entering the eyeball is absorbed by the retina
  • Pupil: Anatomy, Function, and Related Eye Conditions
    What is the Pupil? The pupil is an opening in the iris located directly in the centre of the eye and covered by the cornea Light passes through to the retina as the iris adjusts the size of the pupil, controlling the amount of light that enters the eye, according to the National Eye Institute





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