Word Pronunciation & Dictionary

sinus

/ˈsaɪ.nəs/

Word Rarity Rare

Frequency: Zipf frequency 3.28 in modern English

Syllables: si-nus
IPA: /ˈsaɪ.nəs/

5

Scrabble Score

5

Letters

2

Syllables

4

Unique Chars

Meaning

noun

A pouch or cavity in a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities (the paranasal sinus).

noun

An irregular venous or lymphatic cavity, reservoir, or dilated vessel.

noun

An irregular venous or lymphatic cavity, reservoir, or dilated vessel.

noun

An abnormal cavity or passage such as a fistula, leading from a deep-seated infection and discharging pus to the surface.

noun

A rounded notch or depression between two lobes or teeth in the margin of a leaf or petal.

noun

A bay of the sea; a recess in the shore.

noun

Synonym of sine.

Example Sentences

"So, in the helicopteron, as the helix is at the same time a sustaining plane, it should be likened to a surface moving horizontally, and in which, consequenty, the resistance to motion will be to the lifting power as the sinus is to the cosinus of the angle formed by such plane with the horizon."
"The variations are described in terms of cycles of sinuses and cosinuses."
"Basically, the rotation of the matrix of the factor loadings L represents its post-multiplication, i.e. L* = LO by the rotation matrix O, which itself resembles one of the matrices included in the classical rotational Lie groups SO(m) (containing the specific m–fold combination of sinuses and cosinuses."

Etymology

Learned borrowing from Latin sinus (“a bent surface, curve, hollow”). Doublet of sine.

Inflected Forms

sinuses (plural)

Derived Forms

extrasinus intrasinus nonsinus parasinus sinal sinuscope sinusectomy sinusitis sinuslike sinusoid sinusopathy sinusotomy

Phrases

confluence of sinuses dural sinus dural venous sinus inferior petrosal sinus inferior sagittal sinus pyriform sinus sick sinus syndrome sino-

Synonyms

sine venous sinus fistula

Rhymes With

minus highness linus aquinas dryness shyness slyness wryness venous sinus minos vinous valentinus

Questions

How do you pronounce sinus?: The recorded pronunciation is /ˈsaɪ.nəs/.
What does sinus mean?: A pouch or cavity in a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities (the paranasal sinus).
Where does sinus come from?: Learned borrowing from Latin sinus (“a bent surface, curve, hollow”). Doublet of sine.

How to pronounce sinus

Open the pronunciation page — Open the Speakur entry for “sinus”.
Read the phonetic spelling — Read the IPA spelling (/ˈsaɪ.nəs/) so you know which sounds to aim for.
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