Is 'iris' English, or is it actually Greek?

'Iris' is a word borrowed from Greek 'iris'. The word entered the English language some time around the 15th century.

iris [noun] [15th century]

The Greek goddess of the rainbow and a messenger of the gods

See 'iris' on the Loan Words Map

See more loan words from Greek.

Etymology: Latin, from Greek

See more loan words from 1400s.