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1

iris

play
noun \ˈī-rəs\

Simple Definition of iris

  • : the colored part of your eye

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

Source: Merriam-Webster's Learner's Dictionary

Full 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 illustration b :  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 of iris

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


First Known Use: 15th century

Other Seed Plant Terms

Rhymes with iris


2

iris

verb

Definition of iris

  1. transitive verb
  2. :  to make iridescent



1816

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 of iris

Latin, from Greek


First Known Use: 15th century

Other Mythology and Folklore Terms

Rhymes with iris


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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