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LENS
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
A transparent optical device used to converge or diverge transmitted light and to form images
Synonyms:
Classified under:
Nouns denoting man-made objects
Hypernyms ("lens" is a kind of...):
optical device (a device for producing or controlling light)
Hyponyms (each of the following is a kind of "lens"):
object glass; object lens; objective; objective lens (the lens or system of lenses in a telescope or microscope that is nearest the object being viewed)
eyeglass; monocle (lens for correcting defective vision in one eye; held in place by facial muscles)
meniscus ((optics) a lens that is concave on one side and convex on the other)
intraocular lens (an artificial lens that is implanted into the eye of someone to replace a damaged natural lens or someone who has had a cataract removed)
Fresnel lens (lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length)
field lens (the lens that is farthest from the eye in an optical device with more than one lens)
eyepiece; ocular (combination of lenses at the viewing end of optical instruments)
concave lens; diverging lens (a lens such that a parallel beam of light passing through it is caused to diverge or spread out)
crown lens (a lens made of optical crown glass)
converging lens; convex lens (lens such that a beam of light passing through it is brought to a point or focus)
contact; contact lens (a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication)
condenser; optical condenser (lens used to concentrate light on an object)
compound lens (a lens system consisting of two or more lenses on the same axis)
camera lens; optical lens (a lens that focuses the image in a camera)
anastigmatic lens (a lens designed to correct astigmatism)
anastigmat (compound lens or lens system designed to be free of astigmatism and able to form approximately point images)
Holonyms ("lens" is a part of...):
optical instrument (an instrument designed to aid vision)
Sense 2
Meaning:
Electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons
Synonyms:
electron lens; lens
Classified under:
Nouns denoting man-made objects
Hypernyms ("lens" is a kind of...):
electronic equipment (equipment that involves the controlled conduction of electrons (especially in a gas or vacuum or semiconductor))
Sense 3
Meaning:
Biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focus light on the retina
Synonyms:
crystalline lens; lens; lens of the eye
Classified under:
Hypernyms ("lens" is a kind of...):
organ (a fully differentiated structural and functional unit in an animal that is specialized for some particular function)
Meronyms (parts of "lens"):
cortex; lens cortex (the tissue that surrounds the lens nucleus)
lens capsule (a tenuous mesoblastic membrane surrounding the lens of the eye)
Holonyms ("lens" is a part of...):
eye; oculus; optic (the organ of sight)
Sense 4
Meaning:
(metaphor) a channel through which something can be seen or understood
Example:
the writer is the lens through which history can be seen
Classified under:
Nouns denoting communicative processes and contents
Hypernyms ("lens" is a kind of...):
channel; communication channel; line ((often plural) a means of communication or access)
Domain usage:
figure; figure of speech; image; trope (language used in a figurative or nonliteral sense)
Sense 5
Meaning:
Genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils
Synonyms:
genus Lens; Lens
Classified under:
Hypernyms ("Lens" is a kind of...):
rosid dicot genus (a genus of dicotyledonous plants)
Holonyms ("Lens" is a member of...):
Papilionoideae; subfamily Papilionoideae (alternative name used in some classification systems for the family Papilionaceae)
II. (verb)
Sense 1
Present simple (first person singular and plural, second person singular and plural, third person plural) of the verb lens
Context examples:
On entering the house, however, I examined, as you remember, the sill and framework of the hall window with my lens, and I could at once see that someone had passed out.
(The Adventures of Sherlock Holmes, by Sir Arthur Conan Doyle)
The part of the eye anterior to the lens, including but not limited to the anterior chamber, cornea and related structures.
(Anterior Eye Segment, NCI Thesaurus)
A nasoscope has a light and a lens for viewing and may have a tool to remove tissue.
(Nasoscope, NCI Dictionary)
A nasoscope is a thin, tube-like instrument with a light and a lens for viewing.
(Nasoscopy, NCI Dictionary)
Issue associated with being off-center of optical lenses.
(Optical Decentration Medical Device Problem, Food and Drug Administration)
An optical instrument that uses a combination of lenses to produce magnified images of very small objects
(Microscope Device Component, NCI Thesaurus)
Causes include: • Bacterial or viral infection • Allergies • Substances that cause irritation • Contact lens products, eye drops, or eye ointments
(Pinkeye, NIH: National Eye Institute)
That part of the eyeball anterior to the lens.
(Anterior Eye Segment, NLM, Medical Subject Headings)
The central area in the anterior surface of the lens.
(Anterior Pole of the Lens, NCI Thesaurus)
A microscope is an optical instrument that uses a combination of lenses to produce magnified images of very small objects
(Microscope, NCI Thesaurus)
