Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “sinus”

See all translations

sinus

noun uk   /ˈsaɪ.nəs/ us  

sinus noun (space in body)

[C] any of the spaces inside the head that are connected to the back of the nose [C] specialized medical a space or passage filled with pus (= a thick yellow liquid) that flows to the surface of the skin

sinus noun (heart)

[U] specialized medical the sinoatrial node (= tissue in the heart responsible for the heart's rhythm): The electrocardiogram will confirm sinus bradycardia.
Translations of “sinus”
in Spanish seno…
in French (des) sinus…
in German die Nebenhöhle/Nebenhöhlen…
in Chinese (Traditional) 鼻竇,竇…
in Russian пазуха, полость…
in Turkish sinüs…
in Chinese (Simplified) 鼻窦,窦道…
in Polish zatoka…
(Definition of sinus from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of sinus?
Add Cambridge dictionaries to your browser to your website

Definitions of “sinus” in other dictionaries

Word of the Day

pup

a baby of particular animals, or a puppy

Word of the Day

I won’t tolerate it! Replacing formal words with phrasal verbs.

by Liz Walter,
April 01, 2015
When you are using a language, it is important to understand if a word is formal or informal, so that you can use it in an appropriate way. You might hear people saying dosh for money, or spud for potato, but they wouldn’t write those words in a formal essay. Similarly, a

Read More 

stackin’ p

March 30, 2015
idiom slang earning a lot of money ‘That’s a very generous present.”Yeah, well, she’s stackin’ p, innit?’

Read More