Hydrozoa – מילון אנגלי-אנגלי
Hydrozoa
n.
class of freshwater or marine coelenterates which includes both attached and free-swimming types (Zoology)
Hydrozoa
Hydrozoa (
hydrozoans, from ancient Greek ὕδρα,
hydra, "sea serpent" and ζῷον,
zoon, "animal") are a
taxonomic class of individually very small, predatory animals, some solitary and some colonial, most living in salt water. The colonies of the colonial species can be large, and in some cases the specialized individual animals cannot survive outside the colony. A few genera within this class live in fresh water. Hydrozoans are related to
jellyfish and
corals and belong to the
phylum Cnidaria.
Hydrozoa
Noun
1. coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes
(synonym) class Hydrozoa
(hypernym) class
(member-holonym) Cnidaria, phylum Cnidaria, Coelenterata, phylum Coelenterata
(member-meronym) hydrozoan, hydroid
Hydrozoa
(pl. )
of Hydrozoon
(n. pl.)
The Acalephae; one of the classes of coelenterates, including the Hydroidea, Discophora, and Siphonophora.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter.
About
hydrozoa
