polypus
Concise Oxford English Dictionary © 2008 Oxford University Press:
polypus /ˈpɒlɪpəs/
▶noun (pl. polypi /-pʌɪ/) archaic or technical term for polyp.
– origin ME: via L. from a var. of Gk polupous ‘cuttlefish, polyp’, from polu- ‘many’ + pous, pod- ‘foot’.
'polypus' also found in these Oxford entries:

