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plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals

muscular diaphragm that controls the size of the pupil; it forms the colored portion of the eye

plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals

muscular diaphragm that controls the size of the pupil; it forms the colored portion of the eye

The goddess of the rainbow, and swift-footed messenger of the gods.

The rainbow.

An appearance resembling the rainbow; a prismatic play of colors.

The contractile membrane perforated by the pupil, and forming the colored portion of the eye. See Eye.

A genus of plants having showy flowers and bulbous or tuberous roots, of which the flower-de-luce (fleur-de-lis), orris, and other species of flag are examples. See Illust. of Flower-de-luce.

See Fleur-de-lis, 2.

Inner circle of an oscillated color spot.

The goddess of the rainbow, and swift-footed messenger of the gods.

The rainbow.

An appearance resembling the rainbow; a prismatic play of colors.

The contractile membrane perforated by the pupil, and forming the colored portion of the eye. See Eye.

A genus of plants having showy flowers and bulbous or tuberous roots, of which the flower-de-luce (fleur-de-lis), orris, and other species of flag are examples. See Illust. of Flower-de-luce.

See Fleur-de-lis, 2.

Inner circle of an oscillated color spot.

The rainbow.

The colored circle around the pupil of the eye.

A flowering plant with sword shaped leaves.

The rainbow personified as the messenger of Juno (hera) and the gods.

The most anterior portion of the uveal layer, separating the anterior chamber from the posterior. It consists of two layers - the stroma and the pigmented epithelium. Color of the iris depends on the amount of melanin in the stroma on reflection from the pigmented epithelium.

The pupil of the eye; the rainbow; a spring flower; commonly called flag.

Colored membrane around the pupil and separating anterior and posterior chambers of eye. Root of blue flag, having emetic and cathartic properties.

The rainbow: an appearance resembling the rainbow: the contractile curtain perforated by the pupil, and forming the colored part of the eye: the fleur-de-lis or flagflower:-pl. IRISES.

The rainbow; colored circle of the eye; flowering plant.

A thin, circular, contractile disc suspended in the aqueous humour of the eye between the cornea and lens.

So called from its resembling the rainbow in a variety of colours. A membrane, stretched vertically at the anterior part of the eye, in the midst of the aqueous humour, in which it forms a kind of circular, flat partition, separating the anterior from the posterior chamber. It is perforated by a circular opening called the pupil, which is constantly varying its dimensions, owing to the varying contractions of the fibres of the iris. Its posterior surface has been called uvea, from the thick, black varnish which covers it. The pigmentary stratum, on its free surface, appears to be bounded by a delicate, but sharply defined, line, which has been described as a special. The greater circumference of the iris is adherent to the ciliary processes and circle. It has an external plane of radiated fibres and an internal one of circular fibres, which serve- the one to dilate, the other to contract the aperture of the pupil. The iris receives the irian nerves. Its arteries are furnished by the long ciliary arteries, which form two circles by their anastomoses; the one very broad, near the great circumference; the other, smaller, and seated around the circumference of the pupil. The veins of the iris empty themselves into the Vasa vorticosa, and into the long ciliary veins. The use of the iris seems to be, - to regulate by its dilatation or contraction, the quantity of luminous rays necessary for distinct vision. The different colours of the iris occasion the variety hi the colours of the human eye.

see Herpes Iris- i. Common, I. Germanica- i. Commun, I. Germanica- i. de Florence, I. Florentina.

Pigmented membrane behind the cornea, perforated by the pupil.

Genus of plants with cathartic rhizome.

A thin, circular, contractile membrane, hanging vertically like a curtain in the anterior chamber of the eye. Its posterior surface is covered with pigment. It contains a set of circular muscular fibers, the sphincter, which contracts the pupil; and radiating fibers of elastic tissue which dilate the pupil.

A genus of iridaceous herbs.

Of the U. S. Ph., blue flag, the rhizome and rootlets of Iris versicolor.

n. [Latin, Greek] The rainbow;— an appearance resembling the rainbow;— a coloured membrane at the anterior part of the eye, and perforated by a circular opening called the pupil —a genus of bulbous or tuberous rooted plants.

The rainbow; an appearance of light resembling the rainbow; the circle round the pupil of the eye; the flower-de-luce.