crystalline lens
4 definitions found
crystalline lens - Collaborative International Dictionary of English v.0.48 :
Humor \Hu"mor\, n. [OE. humour, OF. humor, umor, F. humeur, L.
humor, umor, moisture, fluid, fr. humere, umere, to be moist.
See Humid.] [Written also humour.]
1. Moisture, especially, the moisture or fluid of animal
bodies, as the chyle, lymph, etc.; as, the humors of the
eye, etc.
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Note: The ancient physicians believed that there were four
humors (the blood, phlegm, yellow bile or choler, and
black bile or melancholy), on the relative proportion
of which the temperament and health depended.
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2. (Med.) A vitiated or morbid animal fluid, such as often
causes an eruption on the skin. "A body full of humors."
--Sir W. Temple.
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3. State of mind, whether habitual or temporary (as formerly
supposed to depend on the character or combination of the
fluids of the body); disposition; temper; mood; as, good
humor; ill humor.
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Examine how your humor is inclined,
And which the ruling passion of your mind.
--Roscommon.
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A prince of a pleasant humor. --Bacon.
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I like not the humor of lying. --Shak.
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4. pl. Changing and uncertain states of mind; caprices;
freaks; vagaries; whims.
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Is my friend all perfection, all virtue and
discretion? Has he not humors to be endured?
--South.
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5. That quality of the imagination which gives to ideas an
incongruous or fantastic turn, and tends to excite
laughter or mirth by ludicrous images or representations;
a playful fancy; facetiousness.
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For thy sake I admit
That a Scot may have humor, I'd almost said wit.
--Goldsmith.
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A great deal of excellent humor was expended on the
perplexities of mine host. --W. Irving.
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Aqueous humor, Crystalline humor or Crystalline lens,
Vitreous humor. (Anat.) See Eye.
Out of humor, dissatisfied; displeased; in an unpleasant
frame of mind.
Syn: Wit; satire; pleasantry; temper; disposition; mood;
frame; whim; fancy; caprice. See Wit.
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Lens \Lens\ (l[e^]nz), n.; pl. Lenses (-[e^]z). [L. lens a
lentil. So named from the resemblance in shape of a double
convex lens to the seed of a lentil. Cf. Lentil.] (Opt.)
A piece of glass, or other transparent substance, ground with
two opposite regular surfaces, either both curved, or one
curved and the other plane, and commonly used, either singly
or combined, in optical instruments, for changing the
direction of rays of light, and thus magnifying objects, or
otherwise modifying vision. In practice, the curved surfaces
are usually spherical, though rarely cylindrical, or of some
other figure.
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Note: Of spherical lenses, there are six varieties, as shown
in section in the figures herewith given: viz., a
plano-concave; b double-concave; c plano-convex; d
double-convex; e converging concavo-convex, or
converging meniscus; f diverging concavo-convex, or
diverging meniscus.
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Crossed lens (Opt.), a double-convex lens with one radius
equal to six times the other.
Crystalline lens. (Anat.) See Eye.
Fresnel lens (Opt.), a compound lens formed by placing
around a central convex lens rings of glass so curved as
to have the same focus; used, especially in lighthouses,
for concentrating light in a particular direction; -- so
called from the inventor.
Multiplying lens or Multiplying glass (Opt.), a lens one
side of which is plane and the other convex, but made up
of a number of plane faces inclined to one another, each
of which presents a separate image of the object viewed
through it, so that the object is, as it were, multiplied.
Polyzonal lens. See Polyzonal.
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Crystalline \Crys"tal*line\ (kr?s"tal-l?n or -l?n; 277), a. [L.
crystallinus, from Gr. ????: cf. F. cristallin. See
Crystal.]
1. Consisting, or made, of crystal.
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Mount, eagle, to my palace crystalline. --Shak.
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2. Formed by crystallization; like crystal in texture.
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Their crystalline structure. --Whewell.
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3. Imperfectly crystallized; as, granite is only crystalline,
while quartz crystal is perfectly crystallized.
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4. Fig.: Resembling crystal; pure; transparent; pellucid.
"The crystalline sky." --Milton.
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Crystalline heavens, or Crystalline spheres, in the
Ptolemaic system of astronomy, two transparent spheres
imagined to exist between the region of the fixed stars
and the primum mobile (or outer circle of the heavens,
which by its motion was supposed to carry round all those
within it), in order to explain certain movements of the
heavenly bodies.
Crystalline lens (Anat.), the capsular lenslike body in the
eye, serving to focus the rays of light. It consists of
rodlike cells derived from the external embryonic
epithelium.
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crystalline lens - WordNet (r) 2.1 (2005) :
crystalline lens
n 1: biconvex transparent body situated behind the iris in the
eye; its role (along with the cornea) is to focuses light
on the retina [syn: lens, crystalline lens, lens of the eye
]
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