sinus
noun/ˈsaɪ.nəs/
Etymology Learned borrowing from Latin sinus (“a bent surface, curve, hollow”). Doublet of sine.
7 senses
- 1A pouch or cavity in a bone or other tissue, especially…
- 2An irregular venous or lymphatic cavity, reservoir, or…
- 3Relating to or denoting the sinoatrial node of the heart…
- 4An abnormal cavity or passage such as a fistula, leading…
- 5A rounded notch or depression between two lobes or teeth…
- 6A bay of the sea; a recess in the shore.
- 7Synonym of sine.
3
Anatomy, Medicine, Physiology, Sciences Relating to or denoting the sinoatrial node of the heart or its function of regulating the heartbeat.
6
Geography, Natural sciences A bay of the sea; a recess in the shore.
7
Mathematics, Sciences, Trigonometry Synonym of sine.
- 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:
1 more example
- 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:
- Derived terms
36 terms
confluence of sinuses, dural sinus, dural venous sinus, extrasinus, inferior petrosal sinus, inferior sagittal sinus, intrasinus, nonsinus, parasinus, pyriform sinus, sick sinus syndrome, sinal, sino-, sinu-, sinuso-, sinus brady, sinuscope, sinusectomy, sinusitis, sinuslike, sinus node, sinusoid, sinusopathy, sinusotomy, sinus pudoris, sinus rhythm, sinus tachy, sinus tachycardia, sinus venosus, sinus-wise, sphenoidal sinus, splenic sinus, superior petrosal sinus, superior sagittal sinus, urogenital sinus, venosinus