interfluvial

interfluve

[in-ter-floov]
noun
the land area separating adjacent stream valleys.

Origin:
1900–05; back formation from interfluvial lying between streams. See inter-, fluvial

interfluvial, adjective
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World English Dictionary
interfluve (ˈɪntəˌfluːv)
 
n
a ridge or area of land dividing two river valleys
 
[C20: back formation from interfluvial, from inter- + Latin fluvius river]
 
inter'fluvial
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
interfluve   (ĭn'tər-flv')  Pronunciation Key 
The region of higher land between two rivers that are in the same drainage system.
The American Heritage® Science Dictionary
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