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mare's tail

noun,

Definition of mare's tail

plural mare's tails or mares' tails

  1. 1 a :  a common aquatic plant (Hippuris vulgaris of the family Hippuridaceae) with elongated shoots having dense whorls of narrow finely tapered leaves b :  horseweed 1

  2. 2 :  a cirrus cloud that has a long slender flowing appearance




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a timid, meek, or unassertive person

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