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单词 sinus
释义

WordReference Random House Learner's Dictionary of American English © 2024
si•nus /ˈsaɪnəs/USA pronunciation   n. [countable], pl. -nus•es. 
  1. Anatomyone of the hollow cavities in the skull connecting with the nose:Her sinuses are causing her pain; a sinus headache.

WordReference Random House Unabridged Dictionary of American English © 2024
si•nus  (sī′nəs),USA pronunciation n., pl. -nus•es. 
  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. Pathologya narrow passage leading to an abscess or the like.
  5. Botanya small, rounded depression between two projecting lobes, as of a leaf.
  • Latin sinus (stem sinu-) bent or curved surface, curve, fold
  • 1590–1600
si′nus•like′, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::
sinus /ˈsaɪnəs/ n ( pl -nuses)
  1. any bodily cavity or hollow space
  2. a large channel for venous blood, esp between the brain and the skull
  3. any of the air cavities in the cranial bones
  4. a passage leading to a cavity containing pus
Etymology: 16th Century: from Latin: a curve, bay
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更新时间：2025/7/24 5:42:34