Dictionary

sinus en · NOUN

Pronunciation

• (Southern-England) audio
• /ˈsaɪ.nəs/

Etymology

Learned borrowing from Latin sinus (“a bent surface, curve, hollow”). Doublet of sine.

Meanings

1. A pouch or cavity in a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities (the paranasal sinus).
2. An irregular venous or lymphatic cavity, reservoir, or dilated vessel.
3. (attributive) An irregular venous or lymphatic cavity, reservoir, or dilated vessel. ▸ Relating to or denoting the sinoatrial node of the heart or its function of regulating the heartbeat.
4. An abnormal cavity or passage such as a fistula, leading from a deep-seated infection and discharging pus to the surface.
5. A rounded notch or depression between two lobes or teeth in the margin of a leaf or petal.
6. A bay of the sea; a recess in the shore.
7. Synonym of sine.
   • Basically, the rotation of the matrix of the factor loadings L represents its post-multiplication, i.e. L* = LO by the rotation matrix O, which itself resembles one of the matrices included in the classical rotational Lie groups SO(m) (containing the specific m–fold combination of sinuses and cosinuses. 2007, Vladimir G. Ivancevic, Tijana T. Ivancevic, “Introduction: Human and Computational Mind”, in Computational Mind: A Complex Dynamics Perspective (Studies in Computational Intelligence; 60), Springer-Verlag Berlin Heidelberg, →ISBN, →LCCN, section 1 (Natural Intelligence and Human Mind), pages 60–61:
   • So, in the helicopteron, as the helix is at the same time a sustaining plane, it should be likened to a surface moving horizontally, and in which, consequenty, the resistance to motion will be to the lifting power as the sinus is to the cosinus of the angle formed by such plane with the horizon. 1884 November 29, “Aerial Navigation”, in Scientific American: A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures, volume LI, number 22, New York, N.Y.: Munn & Co., translation of original by Victor Tatin in La Nature, page 342, column 1:
   • The variations are described in terms of cycles of sinuses and cosinuses. 1996, Pentti Zetterberg, Matti Eronen, Markus Lindholm, “Construction of a 7500-Year Tree-Ring Record for Scots Pine (Pinus sylvestris, L.) in Northern Fennoscandia and its Application to Growth Variation and Palaeoclimatic Studies”, in Heinrich Spiecker, Kari Mielikäinen, Michael Köhl, Jens Peter Skovsgaard, editors, Growth Trends in European Forests (European Forest Institute Research Report; No. 5), Springer-Verlag Berlin Heidelberg, →ISBN, page 15:

Forms

Deriveds

sinuso- · sinusopathy · venosinus · sinus brady · sinusotomy · sinus node · splenic sinus · sinusoid · parasinus · inferior sagittal sinus · sinus tachycardia · sinus pudoris · nonsinus · pyriform sinus · superior sagittal sinus · sphenoidal sinus · sinus venosus · sinus-wise · sinal · sinu- · sinus tachy · urogenital sinus · sinusectomy · sinuslike · confluence of sinuses · sinuscope · sick sinus syndrome · intrasinus · dural venous sinus · sino- · sinus rhythm · extrasinus · dural sinus · inferior petrosal sinus · sinusitis · superior petrosal sinus

Synonyms

sine

Translations (35)

de (paranasal) Nasennebenhöhle (pouch or cavity in a bone or other tissue) · af sinus (pouch or cavity in a bone or other tissue) · tr sinüs (pouch or cavity in a bone or other tissue) · fi ontelo (pouch or cavity in a bone or other tissue) · gl seo (pouch or cavity in a bone or other tissue) · pl zatoka (pouch or cavity in a bone or other tissue) · ru свищ (abnormal cavity or passage) · pdt Hollinj (pouch or cavity in a bone or other tissue) · mi pakohu (pouch or cavity in a bone or other tissue) · cmn 竇 /窦 (venous or lymphatic cavity) · ast senu (pouch or cavity in a bone or other tissue) · vo sinud (pouch or cavity in a bone or other tissue) · ja 副鼻腔 (pouch or cavity in a bone or other tissue) · fa کاوک (pouch or cavity in a bone or other tissue) · ca si (pouch or cavity in a bone or other tissue) · hu üreg (pouch or cavity in a bone or other tissue) · it seno (pouch or cavity in a bone or other tissue) · fr sinus (pouch or cavity in a bone or other tissue) · ru па́зуха (pouch or cavity in a bone or other tissue) · cs sinus (pouch or cavity in a bone or other tissue) · cs dutina (pouch or cavity in a bone or other tissue) · ar جَيْب اَلْأُنْف (pouch or cavity in a bone or other tissue) · fi avanne (abnormal cavity or passage) · ro sinus (pouch or cavity in a bone or other tissue) · bg синус (pouch or cavity in a bone or other tissue) · eo sinuso (pouch or cavity in a bone or other tissue) · af sinusse (pouch or cavity in a bone or other tissue) · pt seio (pouch or cavity in a bone or other tissue) · cmn 竇 /窦 (pouch or cavity in a bone or other tissue) · es cavidad/alvéolo/alveolo sinusal (pouch or cavity in a bone or other tissue) · io sinuso (pouch or cavity in a bone or other tissue) · de Sinus (pouch or cavity in a bone or other tissue) · ru фи́стула (abnormal cavity or passage) · arz جيوب أنفية (pouch or cavity in a bone or other tissue) · cmn 竇性 /窦性 (relating to the sinoatrial node)