Hydractiniid is a hypernym of hydractinian.
As nouns the difference between hydractiniid and hydractinian
is that hydractiniid is (zoology) any member of the hydractiniidae while hydractinian is (biology) a marine hydroid of the genus (taxlink) or a closely-related genus.
hydractinian
English
Noun
(
en noun)
(biology) A marine hydroid of the genus (taxlink) or a closely-related genus
Hypernyms
*hydractiniid
*hydrozoan
*cnidarian
*animal
*eukaryote
*organism