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plastron

plastron
1. In Chelonia, the lower part of the shell, which is two-layered, consisting of bony plates corresponding to part of the shoulder girdle and abdominal ribs of primitive reptiles, covered by horny epidermal plates. It is joined to the carapace by a bridge between the legs. In some families it is hinged.

2. In some insects, a physical gill made up of hydrofuge hairs. Insects which use a plastron when diving under water are covered with a thick felt of hairs which are bent over at the tips. The hairs trap a layer of air which is continuous with the tracheal system, and surrounds the animal.

3. In Echinodermata, a flattened area between the mouth and anus, formed by the modification of the posterior interambulacrum. It is densely covered with spines.

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"plastron." A Dictionary of Zoology. . Encyclopedia.com. 18 Aug. 2017 <http://www.encyclopedia.com>.

"plastron." A Dictionary of Zoology. . Encyclopedia.com. (August 18, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/plastron-0

"plastron." A Dictionary of Zoology. . Retrieved August 18, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/plastron-0

plastron

plastron breast-shield XVI; ornamental front to a bodice; (nat. hist.) ventral part XIX. — F. — It. piastrone, augm. of piastra breastplate (spec. application of the sense ‘metal plate’, ‘lamina’) — L. emplastrum PLASTER.

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"plastron." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. 18 Aug. 2017 <http://www.encyclopedia.com>.

"plastron." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. (August 18, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/plastron-0

"plastron." The Concise Oxford Dictionary of English Etymology. . Retrieved August 18, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/plastron-0

plastron

plastron (plas-tron) n. the breastbone (sternum) together with the costal cartilages attached to it.

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"plastron." A Dictionary of Nursing. . Encyclopedia.com. 18 Aug. 2017 <http://www.encyclopedia.com>.

"plastron." A Dictionary of Nursing. . Encyclopedia.com. (August 18, 2017). http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/plastron

"plastron." A Dictionary of Nursing. . Retrieved August 18, 2017 from Encyclopedia.com: http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/plastron

plastron

plastron
1.. The lower, bony shell of a turtle.

2.. See IRREGULAR ECHINOIDS.

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"plastron." A Dictionary of Earth Sciences. . Encyclopedia.com. 18 Aug. 2017 <http://www.encyclopedia.com>.

"plastron." A Dictionary of Earth Sciences. . Encyclopedia.com. (August 18, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/plastron

"plastron." A Dictionary of Earth Sciences. . Retrieved August 18, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/plastron

plastron

plastron See carapace.

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"plastron." A Dictionary of Biology. . Encyclopedia.com. 18 Aug. 2017 <http://www.encyclopedia.com>.

"plastron." A Dictionary of Biology. . Encyclopedia.com. (August 18, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/plastron-1

"plastron." A Dictionary of Biology. . Retrieved August 18, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/plastron-1

plastron

plastronAran, Arran, baron, barren, Darren, Karen, Sharon, yarran •Biafran, saffron •plastron • Saharan • Sumatran •heron, perron •rhododendron • chevron •Aaron, Charon, Dáil Eireann •apron •matron, patron •Libran •decahedron, dodecahedron, octahedron, polyhedron, tetrahedron •children • citron • grandchildren •stepchildren • godchildren •schoolchildren •Byron, Chiron, environ, Myron, siren •sporran, warren •squadron • Cochran •Andorran, Doran, Lauren, loran •cauldron •Kieran, Madeiran, schlieren •Honduran, Van Buren •Aldebaran • Auberon • Acheron •Cameron, Decameron •cateran, Lateran •veteran •dipteran, hemipteran •lepidopteran • Lutheran

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"plastron." Oxford Dictionary of Rhymes. . Encyclopedia.com. 18 Aug. 2017 <http://www.encyclopedia.com>.

"plastron." Oxford Dictionary of Rhymes. . Encyclopedia.com. (August 18, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/plastron

"plastron." Oxford Dictionary of Rhymes. . Retrieved August 18, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/plastron