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Definitions for Sinus

[1] a curve; bend.
[2] a curving part or recess.
[3] Anatomy . any of various cavities, recesses, or passages, as a hollow in a bone, or a reservoir or channel for venous blood. one of the hollow cavities in the skull connecting with the nasal cavities. 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.
[6] Sinus. Sinus Iridum.
[7] anatomy any bodily cavity or hollow space a large channel for venous blood, esp between the brain and the skull any of the air cavities in the cranial bones
[8] pathol a passage leading to a cavity containing pus
[9] botany a small rounded notch between two lobes of a leaf, petal, etc
[10] an irregularly shaped cavity

Words related to Sinus

recess, opening, hollow, pocket, channel, depression, antrum

Words nearby Sinus

sinuation, sinuiju, sinumbra lamp, sinuosity, sinuous, sinus, sinus arrest, sinus arrhythmia, sinus block, sinus histiocytosis with massive lymphadenopathy, sinus iridum

Origin of Sinus

1590–1600; < Latin sinus (stem sinu- ) bent or curved surface, curve, fold

Other words from Sinus

si·nus·like , adjective

Word origin for Sinus

C16: from Latin: a curve, bay

Synonyms for Sinus

antrum, channel, depression, hollow, opening, pocket, recess