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treehopper
treehugger
treen
treenail
treenware
treetop
treeware
tref
trefoil
trehala
trehalase
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trefoil

tre·foil [ tr fòyl, tré fòyl ] (plural tre·foils)


noun 
Definition:
 
1. three-lobed shape or object: an object or design with three lobes or connected parts, e.g. an emblem used in heraldry

2. plants plant with three-lobed leaves: a plant of the pea family that has three-lobed leaves, especially clover

3. botany three-lobed leaf or part: a leaf or other plant part with three lobes

4. architecture ornament in shape of clover leaf: an architectural ornament or form resembling a clover leaf

[14th century. Via Anglo-Norman trifoil< Latin trifolium "with three leaves" < folium "leaf"]
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