iridescent

IPA/ˌɪrɪˈdesnt/
KK[ˌɪrədˈɛsənt]IPA/ˌɪrɪˈdesnt/

iridescent — adjective

  • iridescentpositive
  • more iridescentcomparative
  • most iridescentsuperlative

1. describes a surface whose colour appears to shift and shimmer — like a soap bubb

1.adjectiveC1
Definition

describes a surface whose colour appears to shift and shimmer — like a soap bubble, oil on water, or a peacock feather — as you turn your head or as the light moves across it.

Example

Adina watched an iridescent dragonfly hover above the pond at sunset.

iridescent + animal: shimmering wings or shell

The film of oil on Christopher's driveway looked iridescent in the morning sun.

iridescent + film/coating on a surface

Common collocations
  • iridescent wings
  • iridescent feathers
  • iridescent scales
  • iridescent shell
  • iridescent beads
  • iridescent sheen
  • iridescent glow
Synonyms
  • opalescent

    very close synonym; emphasises a milky, opal-like play of colour

  • pearlescent

    soft pearl-like sheen; less rainbow-like than 'iridescent'

  • shimmering

    more general — any wavering shine, not necessarily colour-changing

  • prismatic

    rainbow colours like light through a prism; more technical/scientific

Antonyms
  • matte

    dull, non-reflective surface — the visual opposite

  • drab

    lacking brightness or interesting colour

Usage Note

Almost always attributive (before a noun) or after a linking verb such as 'look' or 'appear'. The shimmer must be visible to the eye — abstract things like ideas, voices, or feelings are not described as 'iridescent' in plain English. Common subjects: wings, feathers, scales, shells, bubbles, oil slicks, beads, fabric, paint.

Common Mistakes

The singer had an iridescent voice.
The singer had a bright, shimmering voice.
'iridescent' is visual only; it cannot describe sound.
iridescent red' (for a flat red painted wall).
bright red' or 'glossy red'.
'iridescent' requires the colour to actually shift when the angle or light changes, not just be vivid.

Word family

  • iridescence
    nounC1
  • iridescently
    adverbC2
  • iris
    nounB2

Synonym discussion

Sense: adjective/1

All four words describe a surface that plays with light, but they differ in the quality of the shine. 'Iridescent' is the most rainbow-like — the colours visibly shift across the spectrum as the angle or light source changes, as on a peacock feather or a soap bubble. 'Opalescent' suggests a softer, milky-white background with hints of pale colour swimming inside, like a real opal. 'Pearlescent' is the gentlest of the four: a smooth pearl-like sheen, mostly white or cream, with only a slight hint of other tones. 'Prismatic' is the most technical and emphasises clear, separated rainbow bands like light passing through a glass prism. So a butterfly wing is iridescent, an opal pendant is opalescent, a car's pearl-white paint is pearlescent, and a beam of sunlight split by crystal is prismatic.

iridescent ↗opalescentpearlescent ↗prismatic

Common collocations

Nouns

Adverbs

  • faintly iridescent
  • brilliantly iridescent
  • almost iridescent

Phrases

  • an iridescent sheen
  • iridescent in the sunlight

Prepositions

  • iridescent with (oil/dew)

Etymology

GreekLatinEnglish

From the Latin word 'iris' (meaning rainbow, and also the name of the Greek goddess of the rainbow) plus the ending '-escent' meaning 'starting to be' or 'showing a quality of'. So 'iridescent' literally describes something that takes on rainbow-like qualities. The word entered English in the late 1700s, originally in scientific writing about minerals and animal coatings, before spreading into everyday descriptive use.