ootid

ootid /oo·tid/ (-tid) a mature oocyte; one of four cells derived from the two consecutive divisions of the primary oocyte. In mammals, the second maturation division is not completed unless fertilization occurs.

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o·o·tid (-td)

n.

The nearly mature ovum after the first maturation division has been completed and the second initiated.

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ootid

[ō′ətid]

Etymology: Gk, ootidion, small egg

the nearly mature ovum after penetration by the spermatozoon and completion of the second meiotic division but before the fusion of the pronuclei to form the zygote. It is one of the four cells resulting from oogenesis. See also meiosis, oogenesis.

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ootid

the cell produced by meiotic division of a secondary oocyte, which develops into the ovum. In mammals, this second maturation division is not completed unless fertilization occurs.