Definition of archaeogastropod in English:

archaeogastropod

(also archeogastropod)

noun

Zoology
  • Any of various chiefly marine gastropod molluscs constituting the prosobranch order Archaeogastropoda, which show several primitive characteristics and comprise many sea snails, limpets, abalones, and related forms.

Origin

1950s; earliest use found in John Edward Morton (b. 1923). From archaeo- + gasteropod, after scientific Latin Archaeogastropoda, order name.

Pronunciation

archaeogastropod

/ˌɑːkɪə(ʊ)ˈɡastrəpɒd/