أُمُّ دَسْمَة
1.
[probably a mistranscription for أُمُّ
دُسْمَةٍ, lit. “ the mother of blackness; ”] (assumed tropical:) The cooking-pot. (T in article ام.)
2.
اخِرُ دَسْمَةٍ
i. q.
اخِرُ عَهْدٍ [The last time]; like اخِرُ مَخْطَرٍ. (TA in article خطر. [See خَطْرَةٌ, last sentence.])