| 1. | The platen had a spiral groove on its surface, like the disk.
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| 2. | It may be smooth or have spiral grooves ( striae ).
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| 3. | Sculptured with fine spiral grooves over the whole surface, 20-25 on body whorl.
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| 4. | The longrifle is an early example of a firearm using rifling, spiral grooves in the bore.
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| 5. | If the machinist isn't careful, he can also leave spiral grooves like those on an LP record.
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| 6. | The spiral groove caused by a parasitic vine was often imitated by its maker if not present.
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| 7. | The operculum itself bears a deep, spiral groove and is also granular on the convex outer surface.
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| 8. | The sculpture consists of 5-7 rounded, equidistant, spiral cords separated by deep spiral grooves of about equal width.
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| 9. | "Rifling " refers to the act of adding spiral grooves to the inside the barrel of a firearm.
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| 10. | They are both found deep to the triceps muscle and are located on the spiral groove of the humerus.
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