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sinus - 8 dictionary results
Allergy and Sinus Relief
Balloon Sinuplasty Minimally Invasive Surgery (818)349-0600
www.marckernermd.com
Tired Of Sinus Problems
Amazing Pepper Extract Nasal Spray Wipe Out Chronic Sinus Congestion
www.SinusBuster.com
Nasal & Sinus Center
California's only complete nasal sinus treatment center.
www.sjo.org

si⋅nus

  [sahy-nuhs]
Use sinus in a Sentence
–noun, plural -nus⋅es.
1. a curve; bend.
2. a curving part or recess.
3. Anatomy.
a. any of various cavities, recesses, or passages, as a hollow in a bone, or a reservoir or channel for venous blood.
b. one of the hollow cavities in the skull connecting with the nasal cavities.
c. an expanded area in a canal or tube.
4. Pathology. a narrow passage leading to an abscess or the like.
5. Botany. a small, rounded depression between two projecting lobes, as of a leaf.
Origin:
1590–1600; < L sinus (s. sinu-) bent or curved surface, curve, fold

Related forms:
si⋅nus⋅like, adjective
Allergy and Sinus Relief
Balloon Sinuplasty Minimally Invasive Surgery (818)349-0600
www.marckernermd.com
Tired Of Sinus Problems
Amazing Pepper Extract Nasal Spray Wipe Out Chronic Sinus Congestion
www.SinusBuster.com

Ir⋅i⋅dum

  [ir-i-duhm]
–noun
Sinus. Sinus Iridum.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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si·nus   (sī'nəs)   
n.  
  1. A depression or cavity formed by a bending or curving.
  2. Anatomy
    1. A dilated channel or receptacle containing chiefly venous blood.
    2. Any of various air-filled cavities in the bones of the skull, especially one communicating with the nostrils.
  3. Pathology A fistula leading from a pus-filled cavity.
  4. Botany A recess or indentation between lobes of a leaf or corolla.

[Middle English, hollow in the body, from Medieval Latin, from Latin, curve, hollow.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Sinus

Si"nus\, n.; pl. L. Sinus, E. Sinuses. [L., a bent surface, a curve, the folds or bosom of a garment, etc., a bay. Cf. Sine, n.]

1. An opening; a hollow; a bending.

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

3. (Anat. & Zo["o]l.) A cavity; a depression. Specifically: (a) A cavity in a bone or other part, either closed or with a narrow opening. (b) A dilated vessel or canal.

4. (Med.) A narrow, elongated cavity, in which pus is collected; an elongated abscess with only a small orifice.

5. (Bot.) A depression between adjoining lobes.

Note: A sinus may be rounded, as in the leaf of the white oak, or acute, as in that of the red maple.

Pallial sinus. (Zo["o]l.) See under Pallial.

Sinus venosus. [L., venous dilatation.] (Anat.) (a) The main part of the cavity of the right auricle of the heart in the higher vertebrates. (b) In the lower vertebrates, a distinct chamber of the heart formed by the union of the large systematic veins and opening into the auricle.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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Language Translation for : sinus
Spanish: seno,
German: die Nebenhöhle, *Nebenhöhlen,
Japanese: とう(の)
More Translations »

sinus 
1597, "abscess, sore," from M.L. sinus, from L. sinus "bend, fold, curve." Meaning "hollow curve or cavity in the body" is attested from 1672. Sinusitis "inflammation of a sinus" is recorded from 1896.
Online Etymology Dictionary, © 2001 Douglas Harper
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Main Entry: si·nus
Pronunciation: 'sI-n&s
Function: noun
: a cavity or hollow in the body: as a : a narrow elongated tractextending from a focus of suppuration and serving for the discharge of pus sinus> b (1) : a cavity in the substance of a bone of the skull that usuallycommunicates with the nostrils and contains air (2) : a channel for venous blood (3) : a dilatation in a bodily canal or vessel
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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sinus si·nus (sī'nəs)
n.

  1. A depression or cavity formed by a bending or curving.
  2. A channel for the passage of blood or lymph, without the coats of an ordinary vessel, such as the blood passages in the gravid uterus or in the cerebral meninges.
  3. Any of various air-filled cavities in the bones of the skull, especially one communicating with the nostrils.
  4. A dilatation in a blood vessel.
  5. A fistula or tract leading to a pus-filled cavity.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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sinus   (sī'nəs)  Pronunciation Key 


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  1. A cavity or hollow space in a bone of the skull, especially one that connects with the nose.
  2. A channel for the passage of a body fluid, such as blood.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Search another word or see sinus on Thesaurus | Reference
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