copepod
Concise Oxford English Dictionary © 2008 Oxford University Press:
copepod /ˈkəʊpɪpɒd/
▶noun Zoology a small or microscopic aquatic crustacean of the large class Copepoda.
– origin from mod. L. Copepoda, from Gk kōpē ‘handle, oar’ + pous, pod- ‘foot’ (because of their paddle-like feet).
'copepod' also found in these Oxford entries:

