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# {{lb|en|botany}} The [[production]] of two or more [[embryo]]s in one [[seed]], due either to the [[existence]] and [[fertilization]] of more than one [[embryonic]] [[sac]] or to the [[origination]] of embryos outside of the embryonic sac. |
# {{lb|en|botany}} The [[production]] of two or more [[embryo]]s in one [[seed]], due either to the [[existence]] and [[fertilization]] of more than one [[embryonic]] [[sac]] or to the [[origination]] of embryos outside of the embryonic sac. |
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#* {{quote-book|year=2012 |title=Embryology of Angiosperms |author=B. M. Johri |page=447 |ISBN=3642693024 |passage=By its nature, that is whether it develops with or without fertilization, simple '''polyembryony''' can be sexual or asexual. }} |
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#* {{quote-book|year=2014 |title=Reproductive Biology of Plants |author=Kishan Gopal Ramawat, Jean-Michel Mérillon, & K. R. Shivanna |page=356|ISBN=1482201321 | passage='''Polyembryony''' was first reported by Leeuwenhoek in citrus as early as 1719 and the different cases of '''polyembryony''' were studied by Braun in 1859. }} |
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# {{lb|en|biology}} The production of two or more embryos from a single [[fertilize]]d [[egg]]. |
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#* {{quote-book|year=1989 |title=Functional Biology of Clonal Animals |author=Roger Neville Hughes |page=90 |ISBN=0412331306 |passage=In all these groups cloning, where it occurs, must be through '''polyembryony''' or parthenogenesis. }} |
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#* {{quote-book|year=2005 |title=Human Malformations and Related Anomalies |author=Roger E. Stevenson & Judith G. Hall |page=1381 |ISBN=019974808X |passage=Despite their utility in research, litters produced by '''polyembryony''' lack the advantages conferred by either asexual or sexual reproduction. }} |
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#* {{quote-book|year=2014 |title=Genetics in the Wild|author=John C. Avise |page= |ISBN=1588344290 |passage=One form of clonal reproduction begins when a fertilized egg divides a few times in the womb before initiating embryonic development. In humans, this can lead nine months later to the birth of identical (monozygotic) twins. This phenomenon, known as '''polyembryony''', occurs sporadically in many mammal species. However, only in armadillos does '''polyembryony''' happen consistently, in each and every pregnancy. }} |
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Revision as of 01:14, 2 July 2017
English
Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for “polyembryony”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)
Noun
polyembryony (uncountable)
- (botany) The production of two or more embryos in one seed, due either to the existence and fertilization of more than one embryonic sac or to the origination of embryos outside of the embryonic sac.
- (biology) The production of two or more embryos from a single fertilized egg.
Translations
Translations
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References
- “polyembryony”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.