The Collaborative International Dictionary
Pseudostoma
Pseudostoma \Pseu*dos"to*ma\, n.; pl. Pseudostomata. [NL. See Pseudo-, and Stoma.] (Anat.) A group of cells resembling a stoma, but without any true aperture among them.
Wiktionary
pseudostoma
n. (context anatomy English) A group of cells resembling a stoma, but without any true aperture among them.