Century Dictionary and Cyclopedia
- n. An ovum; an ovule; an egg itself, when it is in the cell stage, or state of a cell, as a nucleated mass of protoplasm, with or without a nucleolus, and with or without a cell-wall, but ordinarily possessing both. See ovum.
“Bone marrow may be source of new egg-cell generation in adult mammals”
“It is possible for a female robot to be implanted with a human egg-cell that can be fertilized internally by a human male, and for her to nourish that cell in the laboratory of her body and birth it in the human fashion, becoming a surrogate mother to his child.”
“This in spite of the fact that the tiny paternal germ-cell is the only medium of transmission of the paternal qualities, while the mother furnishes the much larger egg-cell, and feeds him throughout the embryonic period.”
“Under all conditions, the sex is determined by a struggle for the mastery in the egg-cell, between the energy of that egg-cell and the energy of the male spermatozoon.”
“Under all conditions, the matter of sex is determined in the egg-cell at the moment of fertilization.”
“The gametophyte or prothallial generation is thus extremely reduced, consisting of but little more than the male and female sexual cells -- the two sperm-cells in the pollen-tube and the egg-cell (with the synergidae) in the embryo-sac.”
“These, as in Gymnosperms, are of two kinds, microspores or pollen-grains, borne in the stamens (or microsporophylls) and megaspores, in which the egg-cell is developed, contained in the ovule, which is borne enclosed in the carpel (or megasporophyll).”
“Parthenogenesis, or the development of an embryo from an egg-cell without the latter having been fertilized, has been described in species of _Thalictrum_, _Antennaria_ and _Alchemilla_.”
“Polyembryony is generally associated with the development of cells other than the egg-cell.”
“In a species of _Allium_, embryos have been found developing in the same individual from the egg-cell, synergids, antipodal cells and cells of the nucellus.”
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