1874, in the meaning defined above
probably borrowed from German Zoosporangium (in plural Zoosporangien), from zoo- zoo- + Sporangium sporangium
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“Zoosporangium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/zoosporangium. Accessed 4 Jul. 2022.
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