Isohyet

A line drawn through geographical points recording equal amounts of precipitation during a specific period.
Found on http://nsidc.org/arcticmet/glossary/isohyet.html

Isohyet

Line (on map) connecting sites of equal rainfall.
Found on http://www.jacanaent.com/PhotoLib/Glossary.htm

Isohyet

A line of equal precipitation amounts.
Found on http://www.encyclo.co.uk/local/22268

Isohyet

The line drawn through geographic points recording equal amounts of rainfall during a given time or
Found on http://www.superglossary.com/Glossary/Science/Weather/

isohyet

line connecting points of equal rainfall
Found on http://phrontistery.info/i.html
No exact match found