An Etymological Dictionary of Astronomy and Astrophysics

1. A globose berry with a yellowish to reddish-orange rind and a sweet edible pulp.
   

2. Any of a group of colors that are between red and yellow in hue (Merriam-Webster.com).

Etymology (EN): M.E., from O.Fr. orange, orenge, from M.L. pomum de orenge, from It. arancia, originally narancia, alteration of Ar. nâranj, from Pers. nârang, from Skt. narangah “orange tree.”

Etymology (PE): Nârenji, from nârenj “orange,” as above.