Search Result for "scyphozoan": 
Wordnet 3.0

NOUN (1)

1. any of various usually free-swimming marine coelenterates having a gelatinous medusoid stage as the dominant phase of its life cycle; 



WordNet (r) 3.0 (2006):

scyphozoan
    n 1: any of various usually free-swimming marine coelenterates
         having a gelatinous medusoid stage as the dominant phase of
         its life cycle