cline
Contents
English[edit]
Etymology 1[edit]
From Ancient Greek κλίνειν (klínein, “to lean, incline”) (from which also climate), from ProtoIndoEuropean *ḱley (English lean).
Pronunciation[edit]
Noun[edit]
cline (plural clines)
 (systematics) A gradation in a character or phenotype within a species or other group.
 Any graduated continuum.
 2005, Ronnie Cann, Ruth Kempson and Lutz Marten, The Dynamics of Language, an Introduction, p. 412
 This account effectively reconstructs the wellknown grammaticalisation cline from anaphora to agreement, …
 2005, Ronnie Cann, Ruth Kempson and Lutz Marten, The Dynamics of Language, an Introduction, p. 412
Derived terms[edit]
Related terms[edit]
Etymology 2[edit]
From c(ircle) + line; compare circline.
Pronunciation[edit]
Noun[edit]
cline (plural clines)
 (geometry, inversive geometry) A generalized circle.

2001, Michael Henle, Modern Geometries: NonEuclidean, Projective, and Discrete^{[1]}, page 77:
 Let C_{1} and C_{2} be two nonintersecting clines. Prove that there is a unique pair of points that are simultaneously symmetric to both C_{1} and C_{2}.

2009, Michael P. Hitchman, Geometry with an Introduction to Cosmic Topology^{[2]}, page 64:
 To visualize Möbius transformations, it is helpful to focus on fixed points and, in the case of two fixed points, on two families of clines with respect to these points.
 2011, Dominique Michelucci, What is a Line?, Pascal Schreck, Julien Narboux, Jürgen RichterGebert (editors), Automated Deduction in Geometry, 8th International Workshop, ADG 2010, Revised Selected Papers, LNAI 6877, page 139,
 Let Ω be a fixed, arbitrary, point. Then circles (in the classical sense) through Ω can be considered as lines. For convenience, such circles are called clines in this section. Two distinct clines cut in one point (ignoring Ω and the two cyclic points); it can happen that Ω is a double intersection point; in this case, one may say that the two clines are parallel, and that they meet at a point at infinity, which is Ω.

Synonyms[edit]
 (generalized circle): circline, generalized circle
Further reading[edit]
 cline at OneLook Dictionary Search