süˈdästəmə noun
Etymology: New Latin, from pseud- + stoma
1. : a stigma in serous membrane filled by intercellular substance or otherwise closed
2. : the temporary mouth of a larval echinoderm
3. : the osculum of a sponge
• pseu·do·stoma·tous |südə|stōməd.əs, -täm- or pseu·dos·to·mous (ˈ)sü|dästəməs adjective