Ṭūl means the longest extension, tawassuṭ the middle one, and qaṣr the shortest. These are technical lengths, not merely slow, medium, or fast recitation.
The source applies this three-way distinction to both temporary madd and temporary madd of līn; the preferred order and permissible combinations still require separate rules.
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The three lengths in order
Madd Lengths and Permissible Combinations — Ṭūl, Tawassuṭ, Qaṣr and Consistency
Ṭūl means the longest extension, tawassuṭ the middle one, and qaṣr the shortest. These are technical lengths, not merely slow, medium, or fast recitation.
The source applies this three-way distinction to both temporary madd and temporary madd of līn; the preferred order and permissible combinations still require separate rules.