Any of several Old World herbs of the genus Medicago having small flowers and trifoliate compound leaves.
A plant of the genus Trifolium.
1 The simple trefoil aperture seems a fair architectural version of the clover-leaves.
2 For, in truth, any small, green three-leafed or trefoil plant will do.
3 Why, my dear fellow, are not clover and trefoil the same things?
4 The ones on my right had that trefoil emblem upside down.
5 Birds-foot trefoil likes very well-drained soil, while self-heal likes moister soil.
6 However, Autaritus recognised a shield shaped like a trefoil on his left arm.
7 Only don't let this trefoil of yours get to fighting with one another.
8 The result was a trefoil - shaped knot that resembled a triangle.
9 The Common Blue only lays its eggs on bird's-foot trefoil .
10 The trefoil ornament in the middle did not look the same as I recalled them.
11 The interstices above contain two trefoil arches, with brackets at the base for the figures.
12 The ordinary clover and all its varieties, including the trefoil and the shamrock, are barometers.
13 We also observed increased levels of mucin and intestinal trefoil factor among TgM9 mice in CAC.
14 The central light has further a very acute arch above it, also filled with a trefoil .
15 A deep trefoil knotted domain in the tertiary structures of member enzymes defines the SPOUT family.
16 Later period - Geometrical trefoil and circular tracery in windows.
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