ضَاحِكَةٌ

, (S, O, K,) or ↓ ضَاحِكٌ, (Msb,) or both, (Mgh,) (tropical:) The tooth next behind the نَاب [or canine tooth]; (Mgh, Msb;) [i. e. the anterior bicuspid;] any one of the four teeth that are between the أَنْيَاب and the أَضْرَاس: (S, O, K:) or any one of the teeth that are in front of the أَضْرَاس that appear on the occasion of laughing: (K:) plural ضَوَاحِكُ. (S, Mgh, O, Msb, K.) أَوضَحُوا بِضَاحِكَةٍ (O, TA,) a phrase occurring in a tradition, (O,) means (assumed tropical:) They smiled. (TA.)