isoclinen.
/ˈʌɪsəʊklʌɪn/ Geology.
An isoclinal fold of a stratum or series of strata.
ΘΚΠ
the world > the earth > structure of the earth > structural features > fold or dip > [noun] > others
isocline1890
synform1937
ptygma1944
1890 in Cent. Dict.
Draft additions 1993
2.
a. Surveying. A line (imaginary or on a map) connecting points of equal gradient. rare.
ΚΠ
1963 Monkhouse & Wilkinson Maps & Diagrams (ed. 2) ii. 118 He [sc. F. Moseley] first plotted all the calculated degrees of slope, and interpolated isopleths of equal slope (isoclines) at degree intervals.
b. Biology. Any line joining points where the rate of change of some variable has a fixed value; spec. a line joining points of zero population growth.
ΘΚΠ
the world > life > biology > balance of nature > population > [noun] > population growth > line joining points of zero growth
isocline1963
1963 Amer. Naturalist 97 210 Let us also connect the points at which the predator population just maintained itself and call this the predator isocline.
1974 Nature 3 May 12/2 Zero isoclines, which depict the separation point between positive and negative population growth, were constructed from continuous populations, maintained by serial transfer.
1987 Theoret. Population Biol. 32 283 Consumer growth isoclines should not be classified using the same terms used to describe nutrition isoclines.., whose axes are amounts consumed of the different resources.
This entry has not yet been fully updated (first published 1900; most recently modified version published online June 2018).
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n.1890