iris
UK[ˈaɪrɪs]US[ˈaɪrɪs]
n
The colored part around the pupil of the eye that controls the amount of light entering it.
n
A tall plant with long, slender leaves and large, showy flowers.
n
A flat, colored, ring-shaped membrane behind the cornea of the eye, with an adjustable circular opening (pupil) in the center.
Etymology
The word 'iris' has a direct lineage from Greek mythology into scientific and common vocabulary. In ancient Greek, 'ἶρις' (îris) meant "rainbow," and was also the name of the goddess who personified the rainbow and served as a messenger of the gods. The application of this term to the colored part of the eye is a metaphorical extension, drawing a direct comparison to the variety of colors found in both a rainbow and the human iris. Similarly, the flower earned its name due to the vibrant spectrum of colors in which it blooms. This journey from a divine personification of a natural phenomenon to precise anatomical and botanical terminology exemplifies the poetic logic embedded within scientific nomenclature.
Analysis
The word 'iris' is a simplex loanword from Greek, adopted directly into Latin and then English. It is not productively segmented into smaller meaningful parts in modern English spelling.
Examples
Her bright blue iris contrasted sharply with the dark pupil.
We planted purple and yellow irises along the garden path.
The ophthalmologist noted that the muscle in his iris was not reacting properly to light.