What's the difference between streak and streek?

Streak

Definition:

(v. t.) To stretch; to extend; hence, to lay out, as a dead body.
(n.) A line or long mark of a different color from the ground; a stripe; a vein.
(n.) A strake.
(n.) The fine powder or mark yielded by a mineral when scratched or rubbed against a harder surface, the color of which is sometimes a distinguishing character.
(n.) The rung or round of a ladder.
(v. t.) To form streaks or stripes in or on; to stripe; to variegate with lines of a different color, or of different colors.
(v. t.) With it as an object: To run swiftly.

Example Sentences:

(1) Cloacal exstrophy, centered on the maldevelopment of the primitive streak mesoderm and cloacal membrane, results in bladder and intestinal exstrophy, omphalocele, gender confusion, and hindgut deformity.
(2) Data from cases with myocardial bridges show that both fatty streaks and raised lesions are seldom observed in the region distal to myocardial bridge.
(3) Evx-1 RNA is first detected shortly before the onset of gastrulation in a region of ectoderm containing cells that will soon be found in the primitive streak.
(4) Gonadoblastoma is an unusual tumor that typically arises in a streak gonad or an abnormal testis of an individual having a Y chromosome.
(5) This study focuses on the expansion and maturation of the fatty streak in the aorta of Watanabe Heritable Hyperlipemic rabbits and comparably hypercholesterolemic fat-fed rabbits between 2 and 6 months duration of hypercholesterolemia.
(6) Fatty streaks were observed in 2nd decade involving only 7.5% of the total intimal surface and reaching to a maximum of 22.2% in the 3rd decade, followed by a gradual rise to 9.2% in 7th decade.
(7) Immunoreactivity in fatty streaks was located around collections of foam cells.
(8) The streaking phenomenon, as well as the tendency toward randomness, was discussed in terms of attentional anomalies.
(9) The high frequency of angioid streaks observed in patients with beta thalassemia and the severe complications observed in one patient render a thorough ophthalmoscopic examination and follow-up of such patients necessary for both early diagnosis and possible therapeutic intervention.
(10) On the back of some appalling results, including a six-game losing streak, the atmosphere at the game against Cardiff was toxic and the abuse intensely personal.
(11) As development proceeded during primitive streak stages, the visceral and parietal endoderm became positively stained.
(12) The mean survival period after angiography was 3.8 months, and the prognosis was not favorable in patients having "thread-and-streak" sign on angiography.
(13) A diet containing 0.3% cholesterol was given to male New Zealand rabbits for 16 weeks; this produced atherosclerotic lesions (fatty streaks) on 80% of the intimal surface of the thoracic aorta and on 45% of the intimal surface of the abdominal aorta.
(14) The area of highest density formed a nasal-temporal band suggestive of a visual streak.
(15) The horizontal streak of high rhodopsin levels is preferentially reduced in this retinopathy.
(16) Density distribution maps for neurons in the ganglion cell layer and the photoreceptor layer reveal the presence of a putative area centralis and a horizontal visual streak.
(17) Atherosclerotic lesions (mostly fatty streaks but some fibrous plaques) were present only in groups C and CL and were absent in groups L and N. The percentage of atherosclerotic intimal involvement was significantly greater in group CL than C (P less than 0.001).
(18) A unique pattern for a carbohydrate antigen is displayed by cells of the primitive streak; antigenicity is lost with de-epithelialisation and ingression, but is regained in a pericellular distribution on the mesoderm cells that emerge from the primitive streak.
(19) Grossly visible fatty streaks and fibrous plaques were not found in any of the swine aorta.
(20) The cluster lies just posterior to the definitive primitive streak in the extraembryonic mesoderm, separated from the embryo by the amniotic fold.