blue+flag

4 entries found for blue flag.
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blue flag quarantine flag sweet flag yellow flag

Main Entry: blue flag
Pronunciation: -flag
Function: noun
1 : either of two common blue-flowered irises (Iris versicolor and I. virginica) of the eastern and central United States with rhizomes formerly used medicinally as a cathartic and emetic
2 : the dried rhizome of a blue flag -- called also blue flag root