from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A form of reproduction in which an unfertilized egg develops into a new individual, occurring commonly among insects and certain other arthropods.
- noun The artificial activation of an unfertilized usually mammalian egg, resulting in an embryolike cell cluster from which stem cells can be harvested.
from The Century Dictionary.
- noun Reproduction by a virgin; in zoology, one of the phenomena attending alternate generation among animals which have sex, a kind of agamogenesis in which an imperfect female individual, hatched from an egg laid by a perfect female after ordinary sexual intercourse, continues to reproduce its kind for one or more generations without renewed impregnation. Parthenogenesis characterizes the reproduction of many insects, as aphids or plant-lice.
- noun In botany: The production of a perfect embryo without the intervention of pollen.
- noun Alternation of generations; metagenesis.
- noun The type of parthenogenesis in which the fertilized eggs produce only one sex.
- noun The normal development of some of the eggs laid by a female animal without fertilization, as in the honey-bee. After the nuptial flight the queen bee returns to the hive with the spermatic receptacle filled with spermatozoa, which retain their vitality for the rest of her life, and fertilize some of the eggs, but not all, as they pass through the oviduct past the duct of the spermatic receptacle. The eggs that are not fertilized develop into male bees or drones, while the fertilized eggs produce females, which may become queens or perfect females, or workers or arrested females, according to the treatment which they receive from the workers after they have been laid. The workers, which make no nuptial flight and are incapable of sexual union, sometimes lay eggs which give rise to males.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Biol.) The production of new individuals from virgin females by means of ova which have the power of developing without the intervention of the male element; the production, without fertilization, of cells capable of germination. It is one of the phenomena of alternate generation. Cf.
heterogamy, and metagenesis.
- noun (Bot.) The production of seed without fertilization, believed to occur through the nonsexual formation of an embryo extraneous to the embryonic vesicle.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biology Referring to various aspects of asexual reproduction:
- noun countable and uncountable
figurativeuses of the biologicsenses
- noun theology
Virgin birth, in reference to the Virgin Maryand Jesus Christ.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun process in which an unfertilized egg develops into a new individual; common among insects and some other arthropods
- noun human conception without fertilization by a man
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
It is the pupa, and not the larva, of the Chironomus which has this power; and Grimm further shows that this case, to a certain extent, unites that of the Cecidomyia with the parthenogenesis of the Coccidæ, the term parthenogenesis implying that the mature females of the Coccidæ are capable of producing fertile eggs without the concourse of the males.
It may have been that they had gone on by what we call parthenogenesis, and we had the children without the father, had the female parent only, the fatherless chinkapin.
Scientists from all over the world have been studying the case of the virgin shark birth around the clock and have come to the conclusion that the female hammerhead shark of Omaha gave birth to the baby hammerhead shark through a process known in medical circles as parthenogenesis, which is a Greek word that apparently means "hammerhead shark birth in the absence of hammerhead shark banging, especially when the hammerhead shark in question is totally not a ho even though everyone used to think that but whatever."
Flora has never mated, or even mixed, with a male dragon, and fertilized all the eggs herself, a process culminating in parthenogenesis, or virgin birth.
Virgin birth, known to biologists as parthenogenesis from the Greek, “parthen” meaning virgin or maiden and “genesis,” beginning, has been seen in other species over the years.
He added: "Breeding without the opposite gender is commonly known as parthenogenesis, other animals that don't need males include a lot of lizards and various snails."
Speaking of weiners, I'm working on an article on shark virgin birth - aka parthenogenesis - and why sex evolved in the first place.
Some species of lizards are all mothers: in a process called parthenogenesis, they somehow trigger their unfertilized eggs to start developing.
“I love this word parthenogenesis,” David Page, an expert on sex evolution at the Whitehead Institute for Biomedical Research in Cambridge, Mass., told me.
And of course this process is called parthenogenesis (ph).