trefoil knot

From trefoil +‎ knot, from being a knot theory knot, where its simplest symmetrical configuration appears like a trefoil.

• A trefoil knot lacking three-fold symmetry
• The trefoil knot with each lobe highlighted
• Trefoil knot

trefoil knot (plural trefoil knots)

1. (topology) A knot formed by joining the two loose ends of a overhand knot to form a knotted loop; the simplest non-trivial knot.

• triquetra