streak

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streak

 [strēk]
a line, stria, or stripe.
angioid s's red to black irregular bands in the ocular fundus running outward from the optic disk.
primitive streak a faint white trace at the caudal end of the embryonic disk, formed by movement of cells at the onset of mesoderm formation, providing the first evidence of the embryonic axis. It eventually undergoes degenerative changes and disappears.

streak

(strēk),
A line, stria, or stripe, especially one that is indistinct or evanescent.
[A.S. strica]

streak

(strēk)
n.
1. A line, mark, smear, or band differentiated by color or texture from its surroundings.
2. Microbiology A sample of microorganisms that has been introduced into a solid culture medium by a needle drawn across its surface.
v. streaked, streaking, streaks
v.tr.
Microbiology To inoculate (a culture medium) with a streak.

streak′er n.

streak

(strēk)
A line, stria, or stripe, especially one that is indistinct or evanescent.
[A.S. strica]

streak

(strēk)
A line, stria, or stripe, especially one that is indistinct or evanescent.
[A.S. strica]