1 stalk of a moss capsule
2 a stiff hair or bristle [also: setae (pl)]
Nounseta (variant of saeta)
- zeta (non-Castillian dialects)
Seta (plural: setae) is a biological term derived from the Latin word for "bristle". It refers to a number of different bristle- or hair-like structures on living organisms.
Animal setaeIn zoology, most "setae" occur in invertebrates.
- Setae in annelids are stiff bristles present on the body. They help for example earthworms to attach to the surface and prevent backsliding during peristaltic motion. These hairs are what make it difficult to pull a worm straight from the ground. Setae in polychaetes (a group including earthworms) are largely composed of chitin.
- Setae on the legs of krill and other small crustaceans help them to gather phytoplankton.
- Setae on gecko footpads are small hair-like processes responsible for the animal's ability to cling to vertical surfaces.
Plant setaeIn botany, "seta" refers to the stalk supporting the capsule of a moss, hornwort or liverwort, and supplying it with nutrients. The seta has a short foot embedded in the gametophyte from which it grows. Setae are not present in all mosses, but in some species they may reach 15 to 20 centimeters in height.
Artificial setaeThe development of adhesives that detach at will yet display substantial stickiness is of great importance for various technological fields.
seta in German: Seta
seta in Esperanto: Ĥeto
seta in French: Seta
seta in Hungarian: Szeta (biológia)
seta in Dutch: Seta
seta in Polish: Seta