Iridal

//ˈʌɪɹɪdəl// adj

Definitions

Adjective
  1. 1
    Pertaining to a rainbow. rare
  2. 2
    Pertaining to the iris of the eye.

    "The iridal dark-brown of her serious eyes had the enigmatic opacity of an Oriental hypnotist's look (in a magazine's back-page advertisement) and seemed to be placed higher that usual so that between its lower rim and the moist lower lid a cradle crescent of white remained when she stared straight at you."

Etymology

Etymology 1

Formed from (the stem of) Latin īris, Ancient Greek ἶρις (îris) + -al.

Etymology 2

From irid- + -al.

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