- a thin leaflike stratum or layer; a lamella.
- a loop; part of a curve terminated at both ends by the same node. Equation: x3 + y3 = 3axy.
- a plane geometrical curve consisting of a loop whose two ends, intersecting at a node, are asymptotic to the same line. Standard equation: x ³ + y ³=3a xy where x = y +a is the equation of the line
- any thin leaflike layer, esp of some metamorphic rocks
