primitive streak - WordReference.com Dictionary of English

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- - prime time
  - prime vertical
  - primer
  - primeval
  - primeval soup
  - primigravida
  - priming
  - primipara
  - primitive
  - primitive cell
  - primitive streak
  - primitivism
  - primo
  - primogenitor
  - primogeniture
  - primordial
  - primordial soup
  - primordium
  - primp
  - primrose
  - primula
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primitive streak

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Concise Oxford English Dictionary © 2008 Oxford University Press:
primitive streak

▶noun Biology the earliest trace of the embryo in a fertilized ovum.

'primitive streak' also found in these Oxford entries:

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