isopod
Concise Oxford English Dictionary © 2008 Oxford University Press:
isopod /ˈʌɪsəpɒd/
▶noun Zoology a crustacean of the order Isopoda, which includes the woodlice and many aquatic forms.
– origin from mod. L. Isopoda, from Gk isos ‘equal’ + pous, pod- ‘foot’.
'isopod' also found in these Oxford entries:

