oocyte defined in 1951 yearoocyte - oocyte;
oocyte - (Zool.). Cell which undergoes meiosis and thereby forms ovum. Primary oocyte undergoes greater part of cytoplasmic growth involved in ovum formation, and first of two meiotic divisions. As a result of this division it gives rise to one cell with very little cytoplasm (polar body) and one secondary oocyte with massive cytoplasm. Latter undergoes second meiotic division, giving rise to another polar body and an ovum. Fertilization frequently occurs in one of the two oocyte stages. Compare with: Spermatocyte.
near oocyte in Knolik
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