<P> In mycology, "setae" refer to dark brown, thick - walled, thorn - like cystidia found in corticioid and poroid fungi in the family Hymenochaetaceae . Though mainly microscopic, the setae of some species may be sufficiently prominent to be visible with a hand lens . </P> <P> In botany, "seta" refers to the stalk supporting the capsule of a moss or liverwort, and supplying it with nutrients . The seta is part of the sporophyte and has a short foot embedded in the gametophyte on which it is parasitic . Setae are not present in all mosses, but in some species they may reach 15 to 20 centimeters in height . </P> <P> In the diatom family Chaetocerotaceae, "seta" refers to the hairlike outgrowths of the valve, i.e. of the face of the cells . These setae have a different structure than the valve . Such setae may prevent rapid sinking and also protect the cells from grazing . </P> <P> Synthetic setae are a class of synthetic adhesives that detach at will, sometimes called resetable adhesives, yet display substantial stickiness . The development of such synthetic materials is a matter of current research . </P>

What is meaning of the seta support your answer with appropriate example