isochasm

[ ahy-suh-kaz-uh m ]

/ ˈaɪ səˌkæz əm /

noun Meteorology.

a line on a map or chart connecting points where auroras are observed with equal frequency.

Nearby words

isocarboxazid, isocarpic, isocellular, isocephalic, isoceraunic, isochasm, isocheim, isochor, isochore, isochromatic, isochromatophil

Origin of isochasm

First recorded in 1880–85; iso- + chasm

Related forms

i·so·chas·mic, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019