Changes

==Origin==

==Origin==

medieval Latin ''spīrāl-is'' ([http://en.wikipedia.org/wiki/Albertus_Magnus Albertus Magnus], a1255), whence also French ''spiral'', Italian ''spirale'', Spanish ''espiral''.

medieval Latin ''spīrāl-is'' ([https://en.wikipedia.org/wiki/Albertus_Magnus Albertus Magnus], a1255), whence also French ''spiral'', Italian ''spirale'', Spanish ''espiral''.

*[http://en.wikipedia.org/wiki/16th_century 1551]

*[https://en.wikipedia.org/wiki/16th_century 1551]

==Definitions==

==Definitions==

*1a : winding around a [[center]] or pole and [[gradually]] receding from or approaching it <the spiral curve of a watch spring>  

*1a : winding around a [[center]] or pole and [[gradually]] receding from or approaching it <the spiral curve of a watch spring>  

:b : [http://en.wikipedia.org/wiki/Helix helical]  

:b : [https://en.wikipedia.org/wiki/Helix helical]  

:c : spiral-bound <a spiral notebook>

:c : spiral-bound <a spiral notebook>

*2: of or relating to the advancement to higher [[levels]] through a series of [[cyclical]] movements  

*2: of or relating to the advancement to higher [[levels]] through a series of [[cyclical]] movements  

==Description==

==Description==

In [[mathematics]], a '''spiral''' is a curve which [[emanates]] from a central [[point]], getting [[progressively]] farther away as it revolves around the point.

In [[mathematics]], a '''spiral''' is a curve which [[emanates]] from a central [[point]], getting [[progressively]] farther away as it revolves around the point.

While a "spiral" and a "[http://en.wikipedia.org/wiki/Helix helix]" are distinct as technical terms, a helix is sometimes [[described]] as a spiral in non-technical usage.  

While a "spiral" and a "[https://en.wikipedia.org/wiki/Helix helix]" are distinct as technical terms, a helix is sometimes [[described]] as a spiral in non-technical usage.  

[[Category: Mathematics]]

[[Category: Mathematics]]