How Do You Spell SINUS?

Pronunciation: [sˈa͡ɪnəs] (IPA)

The word "sinus" is spelled with the letters S-I-N-U-S. The IPA phonetic transcription for this word is /ˈsaɪnəs/. The first sound, /s/, is a voiceless alveolar fricative. The second sound, /aɪ/, is a diphthong made up of an open front unrounded vowel and a close front unrounded vowel. The third sound, /n/, is a voiced alveolar nasal. The fourth sound, /ə/, is a schwa sound. And the final sound, /s/, is the same voiceless alveolar fricative as in the beginning of the word.

SINUS Meaning and Definition

  1. Sinus is a noun that refers to several anatomical structures in the human body. It can have different meanings depending on the context in which it is used. Here are two primary definitions:

    1. Sinus in relation to human anatomy: Sinus generally refers to a hollow cavity or channel within a specific organ or tissue. In the context of the head, it specifically refers to the paranasal sinuses, which are air-filled spaces located within the bones surrounding the nasal cavity. There are four pairs of these sinuses: the frontal sinuses (located in the forehead area), ethmoid sinuses (between the eyes), sphenoid sinuses (behind the ethmoid sinuses), and maxillary sinuses (within the cheekbones). The sinuses serve various functions, including lightening the skull, producing mucus, and enhancing resonance during speech.

    2. Sinus in relation to mathematics and trigonometry: Sinus is also a mathematical function typically denoted as "sin." In trigonometry, the sine of an angle in a right-angled triangle is defined as the ratio of the length of the side opposite to the angle to the length of the hypotenuse. The sine function has a range of values between -1 and 1 and is used extensively in mathematical calculations involving angles and triangles.

    In summary, sinus can refer to air-filled cavities in the head or mathematical functions related to angles and triangles.

  2. 1. A channel for the passage of blood, which has not the coats of an ordinary blood-vessel; such are the blood-passages in the gravid uterus or those in the cerebral meninges. 2. A hollow in bone or other tissue; antrum. 3. A fistula or tract leading to a suppurating cavity.

    A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.

  3. A bend or recess in the coast; in anat., a cavity in a bone, wider at the bottom; a dilated form of vein; in surg., an elongated cavity containing pus; in bot., the indentation or recess formed by the lobes of leaves; a groove or cavity.

    Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.

Top Common Misspellings for SINUS *

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Other Common Misspellings for SINUS

Etymology of SINUS

The word "sinus" has its roots in Latin. It is derived from the Latin word "sinus", which literally meant "bosom", "fold", or "curve". The term was primarily used to refer to the hollow or curved shape of various body parts, such as the bosom, a bay or gulf, and the curved folds inside the body. Over time, the word "sinus" developed different meanings related to these various curved or hollow structures, such as the sinuses in the skull or the nasal sinuses.

Similar spelling words for SINUS

Plural form of SINUS is SINUSES

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