Source : Webster's Revised Unabridged Dictionary (1913)

Tangerine \Tan"ger*ine`\, n. [Etymol. uncertain.] (Bot.)
   A kind of orange, much like the mandarin, but of deeper color
   and higher flavor. It is said to have been produced in
   America from the mandarin. [Written also {tangierine}.]

Source : WordNet®

tangerine
     adj : of a strong reddish orange color
     n 1: a variety of mandarin orange [syn: {tangerine tree}]
     2: any of various deep orange mandarins grown in the United
        States and southern Africa
     3: a reddish to vivid orange color