con tour line

contour line

noun
1.
a line joining points of equal elevation on a surface.
2.
the representation of such a line on a map.
3.
Mathematics. a line parallel to a trace. Compare trace1 ( def 11 ).
Also called contour, level curve, level line.


Origin:
1835–45

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
contour line
 
n
Often shortened to: contour a line on a map or chart joining points of equal height or depth

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
contour line   (kŏn'tr')  Pronunciation Key 


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A line on a map joining points of equal elevation above a given level, usually mean sea level. ◇ The change in elevation between one contour line and the next is the contour interval.
The American Heritage® Science Dictionary
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