Dictionary:

iridic

  (ĭ-rĭd'ĭk, ī-rĭd'-)

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Of or relating to the iris of the eye.

Of or relating to the iris.

Pertaining to the iris.

• i. angle — peripheral margin of the anterior chamber at the limbus.
• i. angle meshwork — see iridocorneal meshwork.
• i. granule — proliferative, well-vascularized extensions of the iridial stroma and pigment epithelium appearing as black, cystic masses along the iridial margin in ruminants and horses. Called also corpora nigra, granula iridica.
• i. stroma — loose connective tissue, blood vessels, chromatophores, smooth muscle in the uveal tract of the eye.

The adjective has 2 meanings:

Meaning #1: of or containing iridium
  Pertains to noun: iridium (meaning #1)

Meaning #2: of or relating to the iris of the eye
  Pertains to noun: iris (meaning #2)