Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- adjective Having body tissues derived from three germ layers, the endoderm, mesoderm, and ectoderm, seen in all multicellular animals except certain invertebrates such as the cnidarians and sponges.
from The Century Dictionary.
- Having three blastodermic membranes or germ-layers, consisting of epiblast, mesoblast, and hypoblast; of or pertaining to the Triploblastica: distinguished from
diploblastic as cœlomatous fromcœlenterate . Most animals are triploblastic.
from the GNU version of the Collaborative International Dictionary of English.
- adjective (Biol.) Of, pertaining to, or designating, that condition of the ovum in which there are three primary germinal layers, or in which the blastoderm splits into three layers.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective Exhibiting
triploblasty .
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
[Greek triploos, triple; see pel- in Indo-European roots + –blastic.]
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Examples
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While bilaterality is a defining characteristic of triploblastic animals, several assemblages have managed to break this symmetry in order to exploit the adaptive peaks garnered through the lateralization of behaviour or morphology.
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"The essence of all these propositions," he writes, "lies in the fact that the segmented animals are traced back not to a triploblastic unsegmented ancestor, but to a two-layered Coelenterate-like animal with
Form and Function A Contribution to the History of Animal Morphology
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