discomedusan
Zoology
noun
A jellyfish of the order or (later) subclass Discomedusae of scyphozoan cnidarians having a free-swimming, typically saucer-shaped or hemispherical medusa as the main stage in their life cycle.
adjective
Of or relating to this order or subclass.
Origin
Late 19th century; earliest use found in The Century Dictionary. After scientific Latin Discomedusae, order name.