-stomum

noun combining form

-sto·​mum

ˈstōməm,

in sense 2stəməm

plural -stoma

-mə

1

: mouth : opening : stoma

prestomum

2

: creature with (such) a mouth

—in generic names

Amphistomum

Oesophagostomum

Word History

Etymology

New Latin, from Greek stoma mouth

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