ظليلة doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has 2 entries for it, distinguished by diacritics. Select one below for the full classical Arabic definition.

• ظَلِيلَةٌ

  ظَلِيلَةٌ ذ A place in which a little water collects and stagnates in a water-course and the like: (Lth, T:) or a place in which water collects and stagnates in the lower part of the torrent of a valley: (M, K:) or the l…

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• ظُلَّيْلَةٌ

  ظُلَّيْلَةٌ ذ A thing which a man makes for himself, of trees, or of a garment, or piece of cloth, by which to protect himself from the heat of the sun: a vulgar word. (TA.)…

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