Definition of pneumostome in English:

pneumostome

noun

Zoology
  • In pulmonate gastropod molluscs: a contractile respiratory orifice connecting the lung with the exterior.

Origin

1940s; earliest use found in Chambers' Technical Dictionary. From pneumo- + -stome.

Pronunciation

pneumostome

/ˈnjuːmə(ʊ)stəʊm/