American Heritage® Dictionary of the English Language, Fourth Edition
- n. Any of numerous coelenterates of the class Hydrozoa, including the freshwater hydras, hydroids, hydrocorals, and siphonophores.
- adj. Of, relating to, or belonging to the class Hydrozoa.
Century Dictionary and Cyclopedia
- Pertaining to the Hydrozoa; resembling the Hydrozoa, or having their characters.
- n. One of the Hydrozoa, as an acaleph, medusan, or jelly-fish.
- n. biology Any of many colonial coelenterates, of the class Hydrozoa, including the hydras, hydroids, hydrocorals, and siphonophores.
- n. colonial coelenterates having the polyp phase dominant
- From New Latin Hydrozōa, class name : hydro- + -zōa, pl. of -zōon, -zoon. (American Heritage® Dictionary of the English Language, Fourth Edition)
“Turritopsis Nutricula is technically known as a hydrozoan and is the only known animal that is capable of reverting completely to its younger self.”
“Turritopsis is technically known as a 'hydrozoan' and is the only animal that is capable of reverting completely to its younger self.”
“Turritopsis nutricula, a hydrozoan, may be as close as it gets to an "immortal" creature, reverting back to its juvenile polyp stage after mating.”
“Scientists say the hydrozoan jellyfish is the only known animal that can repeatedly turn back the hands of time and revert to its polyp state its first stage of life.”
“The hydrozoan Turritopsis nutricula has evolved a remarkable variation on this theme, and in so doing appears to have achieved immortality.”
“Fire coral", actually a hydrozoan, causes skin irritation, corals are sharp and can cause cuts.”
“This tiny hydrozoan can reverse the aging process, transforming from its mature form into its immature form, and back again.”
“The hydrozoan cnidarian, Hydra magnipapillata, has retained four of the six Lhx subfamilies, but apparently lost two others.”
“In some cases, gene relationships among cnidarian groups are congruent with the species phylogeny: hydrozoan sequences are sister-group to scyphozoan sequences, with anthozoan sequences branching basally to this ensemble.”
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