Spanish word for rainbow

Question

What is the difference between "arco iris" "arco de iris" and "arcoíris"

Answer 1

Hola,

According to RAE both are correct: arcoíris and arco iris.

arco.

(Del lat. arcus). ~ iris.

1. m. Fenómeno óptico que presenta en forma de arco de bandas concéntricas los siete colores elementales, causado por la refracción o reflexión de la luz solar en el agua pulverizada, generalmente perceptible en la lluvia.

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Muy interesante leer, muchas gracias :) - FELIZ77, May 7, 2014

Answer 2

arcoiris

Answer 3

arco iris = incorrect ( a lot of people spell it like this though; a music group, stores, websites, etc.), or they forget to put the ' over the first "i" in arcoiris.

arco de iris = incorrect

arcoíris = Correct

Plural it would be = Los arcoíris

I just found the below link from RAE for back-up of the proper spelling;

Click