تيحان doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has an entry for it. Select the entry below for the full classical Arabic definition.

• تَيِّحَانٌ

  تَيِّحَانٌ تيحان , (T, S, A,) or تَيَّحَانٌ, (so in one copy of the S,) or both, (L, K,) like شَيِّآنٌ and شَيَّآنٌ applied to a horse, and هَيِبَّانٌ and هَيَبَّانٌ applied to a man, the only other instances of the ki…

  View in Lane's Lexicon →