- nounsinus (noun) · sinuses (plural noun)
- anatomyzoology(sinuses)a cavity within a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities.
- an irregular venous or lymphatic cavity, reservoir, or dilated vessel.
- medicinean infected tract leading from a deep-seated infection and discharging pus to the surface.
- botanya rounded notch between two lobes on the margin of a leaf or petal.
- physiologyrelating to or denoting the sinoatrial node of the heart or its function as a pacemaker:"sinus rhythm" · "sinus tachycardia"
Originlate Middle English (in the medical sense): from Latin, literally ‘a recess, bend’.Similar and Opposite Wordsnoun- a cavity within a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities.
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- A sinus is a cavity or hollow in any organ or tissue1234. In common usage, "sinus" usually refers to the paranasal sinuses, which are air cavities in the cranial bones, especially those near the nose and connecting to it3. Sinuses can also refer to an abnormal cavity or passage caused by the destruction of tissue3.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.si·nus ˈsī-nəs : cavity, hollow: such as a : a narrow elongated tract extending from a focus of suppuration and serving for the discharge of puswww.merriam-webster.com/dictionary/sinusany of the spaces inside the head that are connected to the back of the nose [ C ] medical specialized a space or passage filled with pus (= a thick yellow liquid) that flows to the surface of the skindictionary.cambridge.org/dictionary/english/sinusA sinus is a sac or cavity in any organ or tissue, or an abnormal cavity or passage caused by the destruction of tissue. In common usage, "sinus" usually refers to the paranasal sinuses, which are air cavities in the cranial bones, especially those near the nose and connecting to it.en.wikipedia.org/wiki/Sinus_(anatomy)noun,plural si·nus·es. a curve; bend. a curving part or recess. Anatomy. any of various cavities, recesses, or passages, as a hollow in a bone, or a reservoir or channel for venous blood.www.dictionary.com/browse/sinus
Sinus Definition & Meaning - Merriam-Webster
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