Isohyetal vs. Isohyet

Isohyetaladjective

Pertaining to, or making use of, isohyets.

‘The weatherman showed an isohyetal map of the country.’;

Isohyetnoun

A line of equal rainfall on a map or chart, such as a weather map.

‘On the yearly rainfall map, the 10-inch (250 mm) isohyet separates viable cropland from desert.’;

Isohyetalnoun

An isohyet.