We found one dictionary that defines the word urniform:

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1. urniform: Wiktionary

Definitions from Wiktionary (urniform) ▸ adjective:  (mycology) Shaped like an urn. ▸ Words similar to urniform ▸ Usage examples for urniform ▸ Idioms related to urniform ▸ Wikipedia articles (New!) ▸ Popular nouns described by urniform ▸ Words that often appear near urniform ▸ Rhymes of urniform ▸ Invented words related to urniform