mare's-tail (mârztāl′)
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Tweet n. pl. mare's-tails or mares'-tails (mârztālz′) 1. A cosmopolitan aquatic herb (Hippuris vulgaris) having inconspicuous flowers and linear whorled leaves on erect unbranched stems. 2. See horseweed. 3. A long narrow cirrus cloud with a flowing appearance. |
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