أُطْرُوَانٌ
The first stage, and the quickness, (غُلَوَاء, in the CK [erroneously] غُلُوّ,) of youth: (K, TA:) like عُنْفُوَانٌ in measure and in meaning. (TA.) One says also,
لِكُلِّ شَىْءٍ أُطْرُوَانِيَّةٌ i. e. [To everything there is] a state of youthfulness. (TA.)