protostome

- See Also:
- - protoceratops
  - protocol
  - protogynous
  - protomartyr
  - proton
  - protonate
  - protonotary
  - Protonotary Apostolic
  - protoplasm
  - protoplast
  - protostome
  - prototherian
  - prototype
  - protozoan
  - protract
  - protracted
  - protractile
  - protraction
  - protractor
  - protrude
  - protrusion
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Concise Oxford English Dictionary © 2008 Oxford University Press:
protostome /ˈprəʊtə(ʊ)stəʊm/

▶noun Zoology an organism whose mouth develops from a primary embryonic opening, such as an annelid, mollusc, or arthropod. Compare with deuterostome.

– origin 1950s: from proto- + Gk stoma ‘mouth’.

'protostome' also found in these Oxford entries:

deuterostome

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protostome