sinus
Language: English
Part of speech: noun
Pronunciation: ipa: /ˈsaɪ.nəs/
rhymes: -aɪnəs
Forms: form: sinuses
Etymology: Learned borrowing from Latin sinus (“a bent surface, curve, hollow”). Doublet of sine.
Senses: topics: anatomy
biology
medicine
natural-sciences
sciences
zoology
zootomy
glosses: 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).
topics: anatomy
medicine
sciences
glosses: An irregular venous or lymphatic cavity, reservoir, or dilated vessel.
topics: anatomy
medicine
physiology
sciences
glosses: 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.
topics: medicine
pathology
sciences
glosses: An abnormal cavity or passage such as a fistula, leading from a deep-seated infection and discharging pus to the surface.
topics: biology
botany
natural-sciences
glosses: A rounded notch or depression between two lobes or teeth in the margin of a leaf or petal.
topics: geography
natural-sciences
glosses: A bay of the sea; a recess in the shore.
examples: text: 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.
ref: 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:
text: The variations are described in terms of cycles of sinuses and cosinuses.
ref: 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:
text: 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.
ref: 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:
topics: mathematics
sciences
trigonometry
glosses: Synonym of sine.
synonyms: word: sine
Derived 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
sinus pudoris
sinus rhythm
sinus tachy
sinus tachycardia
sinus venosus
sphenoidal sinus
splenic sinus
superior petrosal sinus
superior sagittal sinus
urogenital sinus