AskDefine | Define sinus

Dictionary Definition

sinus

Noun

1 an abnormal passage leading from a suppurating cavity to the body surface [syn: fistula]
2 any of various air-filled cavities especially in the bones of the skull
3 a wide channel containing blood; does not have the coating of an ordinary blood vessel [syn: venous sinus]

User Contributed Dictionary

see Sinus

English

Pronunciation

Noun

  1. A pouch or cavity in any organ or tissue, especially the paranasal sinus.
  2. An abnormal cavity or passage such as a fistula, caused by the destruction of tissue.

Derived terms

Translations

pouch or cavity in any organ or tissue
abnormal cavity or passage caused by the destruction of tissue

Catalan

Noun

sinus m
  1. sine (trigonometry)

Czech

Noun

sinus
  1. sine (trigonometry)

Dutch

Noun

sinus m
  1. sine (trigonometry)

French

Pronunciation

Noun

sinus m
  1. sine (trigonometry)

Latin

Etymology 1

Compare French sein, Italian seno, Romansch sain, Romanian sân, Spanish seno

Noun

sinus (genitive: sinūs)
See also

Etymology 2

Noun

sīnus (genitive: sīni)
  1. large bowl
Synonyms

Extensive Definition

Sinus may refer to:
In anatomy, where a sinus is a sac or cavity in any organ or tissue:
In the heart:
  • Sinus node, a structure in the superior part of the right atrium
  • Sinus rhythm, normal beating on an ECG
  • Coronary sinus, a vein collecting blood from the myocardium
  • Sinus venosus, a cavity in the heart of embryos
  • Sinus venarum, a part of the wall of the right atrium in adults, developed from the sinus venosus
Other:

See also

  • Hemocoel, a space filled with hemolymph in organisms with open circulatory systems
  • Sine a trigonometric math function (Latin sinus)
  • Sines, Portugal, a municipality in Alentejo (Latin Sinus)
  • Sinusitis, a common ailment resulting in the inflammation of the paranasal sinuses
sinus in German: Sinus (Begriffsklärung)
sinus in French: Sinus
sinus in Hebrew: סינוס
sinus in Japanese: 副鼻腔
sinus in Polish: Zatoki nosowe
sinus in Russian: Синусы (анатомия)
sinus in Chinese: 鼻竇

Synonyms, Antonyms and Related Words

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