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isanomalous
isanomalous adj. 
/ˌʌɪsəˈnɒml̩əs/, /ˌaɪzəˈnɑmələs/ (of a line) isabnormal; (of a map) depicting such lines.
Brit. /ˌʌɪsəˈnɒmələs/
, /ˌʌɪsəˈnɒmələs//ˌʌɪsəˈnɒml̩əs/U.S. /ˌaɪsəˈnɑmələs/
, /ˌaɪsəˈnɑmələs//ˌaɪzəˈnɑmələs/ΘΚΠ
the world > the earth > weather and the atmosphere > weather > study or science of weather > diagrams, graphs, or lines > [adjective] > temperature > deviation
isanomal1881
isanomalous1900
isabnormal-
1900 Geogr. Jrnl. 15 662 Maps of isotherms and isanomalous lines for January and July.
1927 W. G. Kendrew Climates of Continents 3 ‘Isanomalous lines’ for any month or for the year are lines drawn through places with the same anomaly.
1943 G. T. Trewartha Introd. Climate (ed. 2) i. 56/2 If lines, called isanomals, are drawn on a world map, joining places of equal thermal anomaly, an isanomalous map is the result.
1967 R. W. Fairbridge Encycl. Atmospheric Sci. & Astrogeol. 985/1 Isanomalous lines drawn on a map..reflect regional distortions of the world patterns.
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