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Affixes: the building blocks of English
Affixes: the building blocks of English

-stome Also -stomous.

A mouth.

[Greek stoma, mouth.]

This ending appears in some specialist words in zoology for animals with certain kinds of mouths, as in cyclostome, an eel-like jawless vertebrate with a circular sucking mouth, such as a lamprey or hagfish; protostome (Greek proto-, primitive), a multicellular organism whose mouth develops from a primary embryonic opening, such as a mollusc or arthropod; the peristome (Greek peri-, around) is the part surrounding the mouth of various invertebrates. Such nouns have associated adjectives in -stomous, such as physostomous (Greek physa, bladder), having the mouth and air bladder connected by an air duct. See also -tome.

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