1

iris

play
noun \ˈī-rəs\

Definition of iris

plural

irises

also

irides

play \ˈī-rə-ˌdēz, ˈir-ə-\
  1. 1 :  rainbow

  2. 2 [New Latin irid-, iris, from Greek] a :  the opaque contractile diaphragm perforated by the pupil and forming the colored portion of the eye — see eye illustrationb :  iris diaphragm; also :  a similar device with a circular opening that can be varied in size

  3. 3 also plural iris [New Latin Irid-, Iris, genus name, from Latin] :  any of a large genus (Iris of the family Iridaceae, the iris family) of perennial herbaceous plants with linear usually basal leaves and large showy flowers

Illustration of iris

Origin and Etymology of iris

Middle English, from Latin irid-, iris rainbow, iris plant, from Greek, rainbow, iris plant, iris of the eye — more at wire

Other Seed Plant Terms


2

iris

verb

Definition of iris

  1. transitive verb
  2. :  to make iridescent

First Known Use of iris

1816


Iris

play
noun \ˈī-rəs\

Definition of Iris

  1. :  the Greek goddess of the rainbow and a messenger of the gods

Origin and Etymology of iris

Latin, from Greek

Other Mythology and Folklore Terms


IRIS Defined for English Language Learners

iris

play
noun

Definition of iris for English Language Learners

  • : the colored part of your eye

  • : a plant with long pointed leaves and large blue or yellow flowers


IRIS Defined for Kids

iris

play
noun \ˈī-rəs\

Definition of iris for Students

  1. 1 :  the colored part around the pupil of an eye

  2. 2 :  a plant with long pointed leaves and large usually brightly colored flowers


Medical Dictionary

iris

play
noun \ˈī-rəs\

Medical Definition of iris

plural

irises

or

irides

\ˈī-rə-ˌdēz, ˈir-ə-\play play
  1. 1:  the opaque muscular contractile diaphragm that is suspended in the aqueous humor in front of the lens of the eye, is perforated by the pupil and is continuous peripherally with the ciliary body, has a deeply pigmented posterior surface which excludes the entrance of light except through the pupil and a colored anterior surface which determines the color of the eyes

  2. 2:  iris diaphragm

Illustration of iris



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