bryozoan
Concise Oxford English Dictionary © 2008 Oxford University Press:
bryozoan /ˌbrʌɪəˈzəʊən/ Zoology
▶noun a sedentary aquatic invertebrate of the phylum Bryozoa, which comprises the moss animals. ▶adjective relating to the bryozoans.
– origin from mod. L. Bryozoa, from Gk bruon ‘moss’ + zōia ‘animals’.
'bryozoan' also found in these Oxford entries:

