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) a line, stria, or stripe.
angioid streaks  red to black irregular bands in the ocular fundus running outward from the optic disk.
fatty streak  a small, flat, yellow-gray area, composed mainly of cholesterol, in an artery; possibly an early stage of atherosclerosis.
meningitic streak  tache cérébrale.
Moore's lightning streaks  vertical flashes of light sometimes seen on the peripheral side of the field of vision when the eyes are moved, a benign condition.
primitive streak  a faint white trace at the caudal end of the embryonic disc, formed by movement of cells at the onset of mesoderm formation and providing the first evidence of the embryonic axis.

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

Etymology: AS, strican, to stroke
a line or a stripe, such as the primitive streak at the caudal end of the embryonic disk.

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]

streak

a line or stripe.

angioid s's
red to black irregular bands in the ocular fundus running outward from the optic disk.
streak canal
the papillary duct, the canal between the exterior and the lactiferous sinus within the teat of a ruminant.
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.