AskDefine | Define seta

Dictionary Definition

seta

Noun

1 stalk of a moss capsule
2 a stiff hair or bristle [also: setae (pl)]

User Contributed Dictionary

English

Noun

  1. A bristle or hair
  2. : The stalk of a moss sporangium

Anagrams

Faroese

Verb

seta
  1. to set, to put

Galician

Noun

seta f
  1. arrow.

Italian

Noun

  1. silk

Latin

Noun

seta (variant of saeta)

Portuguese

Noun

seta

Spanish

Pronunciation

IPA: /'seta/

Homophones

  • zeta (non-Castillian dialects)

Etymology

Unknown

Noun

seta

Synonyms

Extensive Definition

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 setae

In 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 setae

In 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 setae

The development of adhesives that detach at will yet display substantial stickiness is of great importance for various technological fields.

References

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

Synonyms, Antonyms and Related Words

Privacy Policy, About Us, Terms and Conditions, Contact Us
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2
Material from Wikipedia, Wiktionary, Dict
Valid HTML 4.01 Strict, Valid CSS Level 2.1