ترطيل doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has an entry for it. Select the entry below for the full classical Arabic definition.

• تَرْطِيلٌ Form 2

  2 تَرْطِيلٌ ذ The act of weighing by, or with, أَرْطَال [or pound-weights]. (K.) [See also 1.] -A2- Also The anointing of the hair, (S, O,) or making it soft, or smooth, (K,) with oil, or ointment, and the crimping (تَكْ…

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