Noun venous sinus has 1 sense
  1. venous sinus, sinus - a wide channel containing blood; does not have the coating of an ordinary blood vessel
    --1 is a kind of duct, epithelial duct, canal, channel
    --1 has particulars:
     cavernous sinus, sinus cavernosus; coronary sinus, sinus coronarius; sigmoid sinus, sinus sigmoideus; straight sinus, tentorial sinus, sinus rectus; transverse sinus, sinus transversus
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