Definitions for bilateria
bi·la·te·ri·a

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1. Bilateria

   The Bilateria or bilaterians are animals with bilateral symmetry as an embryo, i.e. having a left and a right side that are mirror images of each other. This also means they have a head and a tail (anterior-posterior axis) as well as a belly and a back (ventral-dorsal axis). Nearly all are bilaterally symmetrical as adults as well; the most notable exception is the echinoderms, which achieve secondary pentaradial symmetry as adults, but are bilaterally symmetrical during embryonic development. Most animals are bilaterians, excluding sponges, ctenophores, placozoans and cnidarians. For the most part, bilateral embryos are triploblastic, having three germ layers: endoderm, mesoderm, and ectoderm. Except for a few phyla (i.e. flatworms and gnathostomulids), bilaterians have complete digestive tracts with a separate mouth and anus. Some bilaterians lack body cavities (acoelomates, i.e. Platyhelminthes, Gastrotricha and Gnathostomulida), while others display primary body cavities (deriving from the blastocoel, as pseudocoeloms) or secondary cavities (that appear de novo, for example the coelom).

WikidataRate this definition:5.0 / 1 vote

1. Bilateria

   The bilateria are all animals having a bilateral symmetry, i.e. they have a front and a back end, as well as an upside and downside. In contrast, radially symmetrical animals like jellyfish have a topside and downside, but no front and back. The bilateria are a subregnum of animals, including the majority of phyla but not sponges, cnidarians, placozoans and ctenophores. For the most part, Bilateria embryos display three different germ layers, called the endoderm, mesoderm, and ectoderm. From this they are called triploblastic. Nearly all are bilaterally symmetrical, or approximately so; the most notable exception is the echinoderms, which achieve near-radial symmetry as adults, but are bilaterally symmetrical as larvae. Except for a few phyla, the Bilateria have complete digestive tracts with separate mouth and anus. Some Bilateria lack body cavities, while others display primary body cavities and/or secondary cavities.

How to pronounce bilateria?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say bilateria in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of bilateria in Chaldean Numerology is: 2

2. Pythagorean Numerology

   The numerical value of bilateria in Pythagorean Numerology is: 5

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References

1. ^ Wikipedia
   https://en.wikipedia.org/wiki/Bilateria
2. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=bilateria