Definition of 等寒線 (とうかんせん)
とうかんせん
                        等寒線
とうかんせん
toukansen
noun
•
        
isocheim, isochime, isochryme, map contour connecting points with the same mean winter temperature
Related Kanji
| 等 | etc., and so forth, class (first), quality, equal, similar | 
| 寒 | cold | 
| 線 | line, track |