| diameter |
In geometry, a diameter (Greek words diairo = divide and metro = measure) of a circle is any straight line segment that passes through the center and whose endpoints are on the circular boundary, or, in more modern usage, the length of such a line segment. When using the word in the more modern sense, one speaks of the diameter rather than a diameter, because all diameters of a circle have the same length. This length is twice the radius. ...
출처: en.wikipedia.org/wiki/Diameter
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| diamond disk |
Diamond Disk or Diamond Disc was the brand name for a specific variety of phonograph record patented by Thomas Edison in 1912. The records played at 78 rpm, like the conventional records of the era, but were made of a harder material that was more difficult to break. ...
출처: en.wikipedia.org/wiki/Diamond_Disk
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| diamorphine |
Heroin or diamorphine (INN) (colloquially referred to as junk, babania, horse, golden brown, smack, black tar, H, big H, lady H, dope, skag, juice, diesel, etc.) is an alkaloid opioid. Heroin is the 3,6-diacetyl derivative of morphine (hence diacetylmorphine) and is synthesised from it by acetylation. The white crystalline form is commonly the hydrochloride salt, diamorphine hydrochloride. It is highly addictive. ...
출처: en.wikipedia.org/wiki/Diamorphine
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| diapause |
Embryonic diapause, in mammals is a condition where pre-implantation blastocysts are maintained in a state of dormancy, often due to environmental cues, until such time as the environment improves. Diapause occurs in over 100 species of mammals in distantly related organisms, such as the skunk and the wallaby. Much of the work in diapause regulation and physiological studies of the mother and of the developing embryo, have been conducted upon kangaroos. ...
출처: en.wikipedia.org/wiki/Diapause
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| diatomite |
Diatomaceous earth, also known as diatomite, kieselguhr, kieselgur, and Celite, is a naturally occurring, soft, chalk-like, sedimentary rock mineral that is easily crumbled into a fine white to off-white powder. This powder has an abrasive feeling similar to pumice powder and is very light-weighed due to its high porosity. It is made primarily of silica and consists of fossilized remains of diatoms, a type of hard-shelled algae. ...
출처: en.wikipedia.org/wiki/Diatomite
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