| helix |
A continuous and uniform turn of constant radius, generally over more than 360? These come in two varieties, ascending, and descending. Also used more informally to describe a similar, but non-uniform turn, such a helix that is slanted on a sharp angle, or rises and falls as the turn progresses.
출처: www.coasterglobe.com/features/quickreference-dicti...
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| helical |
refers to the way fletching is laid on an arrow. Rather than straight, helical fletching curves slightly around the arrow shaft.
출처: tucsonarchery.com/Archery_Terms.php
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| helium |
The second lightest and second most abundant element. The typical helium atom consists of a nucleus of two protons and two neutrons surrounded by two electrons. Helium was first discovered in our Sun. Roughly 25 percent of our Sun is helium.
출처: www.bjp.org.cn/apod/glossary.htm
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| helium |
A colorless, odorless gas. It is the 2nd most abundant element in the universe.
출처: www.bigbangband.biz/glossary.html
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| helix |
the part of a spinning band that is machined or twisted into a screw type configuration which causes the liquid in the still to be pumped downward.
출처: www.solvent--recycling.com/glossary.htm
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