1902 Webster's Internat. Dict. Eng. Lang. Suppl.Interstream a. (Phys. Geog.), between streams.
1968 D. S. Simonett in R. W. Fairbridge Encycl. Geomorphol. 559 Many geomorphologists today use the term [sc. interfluve] for the interstream area to imply a discrete landscape or geomorphic unit.