We found one dictionary that defines the word potamographical:

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1. potamographical: Wiktionary

Definitions from Wiktionary (potamographical) ▸ adjective:  Relating to potamography. ▸ Words similar to potamographical ▸ Usage examples for potamographical ▸ Idioms related to potamographical ▸ Wikipedia articles (New!) ▸ Popular nouns described by potamographical ▸ Words that often appear near potamographical ▸ Rhymes of potamographical ▸ Invented words related to potamographical