Princeton's WordNet

1. iris, flag, fleur-de-lis, sword lily(noun)

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

2. iris(noun)

   muscular diaphragm that controls the size of the pupil which in turn controls the amount of light that enters the eye; it forms the colored portion of the eye

3. iris, iris diaphragm(noun)

   diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening

Wiktionary

1. iris(Noun)

   A plant of the genus Iris, common in the northern hemisphere, and generally having attractive blooms.

2. iris(Noun)

   The contractile membrane perforated by the pupil, which adjusts to control the amount of light reaching the retina, and which forms the colored portion of the eye.

3. iris(Noun)

   A diaphragm used to regulate the size of a hole, especially as a way of controlling the amount of light reaching a lens.

4. iris(Noun)

   A rainbow, or other colourful refraction of light.

5. iris(Verb)

   (of an aperture, lens or door) To open or close in the manner of an iris.

6. Iris(ProperNoun)

   A messenger of the gods, and goddess of rainbows.

7. Iris(ProperNoun)

   ; a flower name used since the end of the 19th century.

8. Iris(ProperNoun)

   , an asteroid

Origin: Ἶρις iris "rainbow".

Webster Dictionary

1. Iris(noun)

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

2. Iris(noun)

   the rainbow

3. Iris(noun)

   an appearance resembling the rainbow; a prismatic play of colors

4. Iris(noun)

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

5. Iris(noun)

   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

6. Iris(noun)

   see Fleur-de-lis, 2

The Nuttall Encyclopedia

1. Iris

   the daughter of Thaumus (i. e. wonder) and of the ocean nymph Electra (i. e. splendour); was the goddess of the rainbow, and as such the messenger of the gods, particularly of Zeus and Hera, the appearance of the rainbow being regarded as a sign that communications of good omen were passing between heaven and earth, as it was to Noah that they would continue to be kept up; she is represented as dressed in a long wide tunic, over which hangs a light upper garment, and with golden wings on her shoulders.

U.S. National Library of Medicine

1. Iris

   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.

• irisAfrikaans
• قُزْحِيَّة العَيْنArabic
• ирисBulgarian
• írisPortuguese (BR)
• duhovkaCzech
• die IrisGerman
• regnbuehinde; irisDanish
• ίριδαGreek
• irisSpanish
• vikerkestEstonian
• عنبیهFarsi
• iirisFinnish
• irisFrench
• קַשתִיתHebrew
• आख की पुतलीHindi
• šarenica u okuCroatian
• szivárványhártyaHungarian
• anak mataIndonesian
• lithimnaIcelandic
• irideItalian
• 虹彩Japanese
• 홍채Korean
• rainelėLithuanian
• varavīksneneLatvian
• irisMalay
• irisDutch
• regnbuehinneNorwegian
• tęczówkaPolish
• قسمت رنگه چشم، عنبیهPersian
• د سترګو رنګه برخهPashto
• írisPortuguese
• irisRomanian
• радужная оболочкаRussian
• dúhovkaSlovak
• šarenicaSlovenian
• dužicaSerbian
• irisSwedish
• ม่านตาThai
• gözbebeği etrafındaki renkli halka, irisTurkish
• 虹膜Chinese (Trad.)
• райдужна оболонкаUkrainian
• آنکھ میں قرنیے کے پیچھے گول رنگدار جھلّیUrdu
• tròng đenVietnamese
• 虹膜Chinese (Simp.)