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streak
(redirected from primitive streak)

   Also found in: Dictionary/thesaurus, Medical, Encyclopedia, Wikipedia 0.01 sec.
See: frame


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Furthermore, at about 14 days, the appearance of the primitive streak in the embryo corresponds to the beginning of neural functions.
For example, bioethics commissions in England, Canada, and the United States that have studied embryo status have all recommended drawing the moral line at the development of the so-called primitive streak at about fourteen days, when twinning is no longer possible and the trajectory of individual development has begun.
Last year Irish apprentice Sean Cleary died after suffering severe head injuries in a fall at Galway and Caroline Pratt, 42, was killed just two weeks ago when her horse, Primitive Streak, fell on her in the Burghley Horse Trials.
 
 
 
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