ðə dˌɛfɪnˈɪʃən ʌv tɹˈiːlaɪn ʌv kənˈɪfɚɹˌiː: ðə wˈɔːɹmɪst mˈʌnθ hɐz ɐn ˈævɹɪdʒ tˈɛmpɹɪtʃɚɹ ʌv bᵻlˌoʊ tˈɛn dᵻɡɹˈiːz sˈiː ɔːɹ
The definition of treeline of Coniferae: the warmest month has an average temperature of below 10°C or