potamologistn.
/ˌpɒtəˈmɒlədʒɪst/, U.S. /ˌpɑdəˈmɑlədʒəst/ An expert in or student of potamology.
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potamologist1863
1863 Geol. Soc. Jrnl. Aug. 322 Consequences..strangely overlooked both by engineers and potamologists.
1951 R. K. Linsley in T. F. Malone Compend. of Meteorol. 1048 The dryweather flow of most streams is derived largely from ground water and the potamologist must therefore concern himself with the ground-water features of his area.
1993 St. Louis (Missouri) Post-Dispatch (Nexis) 23 Aug. (Everyday Mag.) 1 d The envy of serious students of the Mississippi are the Chinese monks who for several thousand years have been noting the flood levels of the Yangtze, says Claude N. Strauser, chief potamologist at the Corps' St. Louis establishment.
This entry has been updated (OED Third Edition, December 2006; most recently modified version published online March 2022).
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n.1863