pupil

[n] - contractile aperture in the iris of the eye
Found on http://www.webdictionary.co.uk/definition.php?query=pupil

Pupil

the variable hole in the middle of the iris which admist light into the eye.
Found on http://www.trayner.co.uk/Info/Glossary.html

Pupil

the opening at the centre of the iris in the eye that constricts (contracts) and dilates (widens) in response to light
Found on http://www.medichecks.com/glossary.cfm?ltr=P

pupil

The circular part of the iris
Found on http://www.generalandmedical.com/glossary/index_alpha_Results.html?mode=P

Pupil

The dark circular aperture at the centre of the iris of the eye through which light passes.
Found on http://www.gadsbywicks.co.uk/uploaded/3822.pdf

Pupil

Pupil: The opening of the iris. The pupil may appear to open (dilate) and close (constrict) but it is really the iris that is the prime mover; the pupil is merely the absence of iris. The pupil determines how much light is let into the eye. Both pupils are usually of equal size. If they are not, that is termed anisocoria (from 'a-', not + 'iso', eq...
Found on http://www.medterms.com/script/main/art.asp?articlekey=5135

Pupil

Pu'pil noun [ French pupille , noun fem., Latin pupilla the pupil of the eye, originally dim. of pupa a girl. See Puppet , and confer Pupil a scholar.] (Anat.) The aperture in the iris; the sight, apple, or black of the eye. See the Note under Eye , an...
Found on http://www.encyclo.co.uk/webster/P/196

pupil

1. A youth or scholar of either sex under the care of an instructor or tutor. 'Too far in years to be a pupil now.' (Shak) 'Tutors should behave reverently before their pupils.' (L'Estrange) ... 2. A person under a guardian; a ward. ... 3. A boy or a girl under the age of puberty, that is, under fourteen if a male, and under twelve if a female. ......
Found on http://www.encyclo.co.uk/local/20973

pupil

noun contractile aperture in the iris of the eye
Found on https://www.encyclo.co.uk/local/20974

pupil

(P) (pu┬┤pil) the opening in the center of the iris through which light enters the eye.
Found on http://www.encyclo.co.uk/local/21001

Pupil

• (n.) A boy or a girl under the age of puberty, that is, under fourteen if a male, and under twelve if a female. • (n.) A person under a guardian; a ward. • (n.) The aperture in the iris; the sight, apple, or black of the eye. See the Note under Eye, and Iris. • (n.) A youth or scholar of either sex under the care of an instruc...
Found on http://thinkexist.com/dictionary/meaning/pupil/

pupil

in the anatomy of the eye, the opening within the iris through which light passes before reaching the lens and being focused onto the retina. The ... [6 related articles]
Found on http://www.britannica.com/eb/a-z/p/133

pupil

in optical systems, the virtual image of an aperture associated with mirrors, prisms, and lenses and their combinations. The shows the case of an ... [2 related articles]
Found on http://www.britannica.com/eb/a-z/p/133

pupil

pupil 1. The contractile aperture in the iris of the eye. 2. A learner who is enrolled in an educational institution. 3. A young person attending school (up through senior high school) who is learning under the close supervision of a teacher at school, a private tutor, or the like; a student. 4. Roman Law, a person under the age of puberty, orph...
Found on http://www.wordinfo.info/words/index/info/view_unit/1799/

pupil

The circular opening in the iris at the front of the eye. The size of the pupil determines the amount of light that enters the eye, and is controlled by the dilator and sphincter muscles of the iris. These muscles in turn react to changes in the light level received by the retina. Pupil size is an...
Found on http://www.daviddarling.info/encyclopedia/P/pupil.html

pupil

pupil: see eye.
Found on http://www.infoplease.com/ce6/sci/A0917842.html

Pupil

The pupil can be seen in the center of the iris of the eye where it appears to be black in colour. Around the pupil is a sphincter muscle that contracts according to the light conditions. If the eye is exposed to strong light, the pupil contracts, protecting the nerve cells at the back of the eye. In low light, the pupil enlarges to let in as much ...
Found on http://www.probertencyclopaedia.com/browse/EP.HTM

pupil

(p) Type: Term Pronunciation: pyū′pĭl Definitions: 1. The circular orifice in the center of the iris, through which the light rays enter the eye. Synonyms: pupilla
Found on http://www.medilexicon.com/medicaldictionary.php?t=74139

Pupil

The black, circular opening in the center of the iris, which is the colored portion of the eye.
Found on http://www.encyclo.co.uk/local/21361

pupil

The central opening of the iris, through which light penetrates into the inner reaches of the eye.
Found on http://www.thehorse.com/Glossary.xhtml?L=P

pupil

Latin pupilla = the central black orifice in the iris; adjective - pupillary.
Found on http://www.anatomy.usyd.edu.au/glossary/glossary.cgi?

pupil

The aperture within the iris.
Found on http://eyediologyopticians.co.uk/pages/Eye-terms-explained.html

pupil

The opening through the iris that permits light to enter the posterior cavity of the eyeball and be refracted by the lens through the vitreous chamber.
Found on http://www.mhhe.com/biosci/abio/glossary.mhtml

Pupil

The adjustable opening at the front of the eye (the black 'hole' in the iris) that expands and contracts to regulate the amount of light entering the eye.
Found on http://www.encyclo.co.uk/local/21534

pupil

The round opening in the center of the iris (the colored tissue that makes the "eye color" at the front of the eye). The pupil changes size to let light into the eye. It gets smaller in bright light and larger as the amount of light decreases.
Found on http://www.cancer.gov/dictionary?expand=P
No exact match found