Winding in a continuous and gradually widening (or tightening) curve, either around a central point on a flat plane or about an axis so as to form a cone
a spiral column of smoke
Each of the spirals of light that are visible when polarized light which has been passed through two plates of left-handed and right-handed quartz is viewed through crossed Nicol prisms.
A spiralling downward path taken by an aircraft that is out of control
(Of a book or notepad) bound with a wire or plastic spiral threaded through a row of holes along one edge
A galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms
The line joining successive points of insertion in a spiral pattern of phyllotaxis.
Designating a branch of the brachial plexus that winds around the humerus to supply muscles and skin of the arm and forearm (now known as the radial nerve); of, relating to, or associated with this nerve.
= virtuous circle.
A spiral-shaped intrauterine contraceptive device, made of plastic.
A spiral in which the length of the radius vector is inversely proportional to the angle through which it is turned.
A spiral such that the angle between the tangent and the radius vector is the same for all points of the spiral
Another term for equiangular spiral.
Decrease or deteriorate continuously