/ˈsaɪ.nəs/
OriginLearned borrowing from Latin sinus (“a bent surface, curve, hollow”). Doublet of sine.
- 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).
- An irregular venous or lymphatic cavity, reservoir, or dilated vessel.
- attributiveRelating to or denoting the sinoatrial node of the heart or its function of regulating the heartbeat.
- An abnormal cavity or passage such as a fistula, leading from a deep-seated infection and discharging pus to the surface.
- A rounded notch or depression between two lobes or teeth in the margin of a leaf or petal.
- A bay of the sea; a recess in the shore.
- 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 ”
“The variations are described in terms of cycles of sinuses and cosinuses.”
“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 cla”
Formssinuses(plural)