ir ‧ i ‧ des ‧ cent /ˌɪrəˈdes ə nt◂, ˌɪrɪˈdes ə nt◂/ BrE AmE adjective formal
[ Date: 1700-1800 ; Language: Latin ; Origin: iris ; ⇨ ↑ iris ]
showing colours that seem to change in different lights:
small iridescent blue flies
—iridescence noun [uncountable]