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lig·ule | \ ˈli-(ˌ)gyül 
\
\Definition of ligule
: a scalelike projection especially on a plant: such as
a : a thin appendage of a foliage leaf and especially of the sheath of a blade of grass
b : a ligulate corolla of a ray floret in a composite head
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Time Traveler for ligule
The first known use of ligule was circa 1847
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