| period |
The fundamental unit in the hierarchy of time units; a part of geologic time during which a particular sequence of rocks designated as a system was deposited. Units of geological time that are the major subdivisions of Eras.
출처: www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBook...
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| periostitis |
Inflammation involving the periosteum. May result in new bone formation.
출처: www.ilar.org/Glossary/Glossary_p.htm
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| periodic table |
The arrangement, by atomic number, of elements into groups with similar chemical properties.
출처: www.everyscience.com/Chemistry/Glossary/P.php
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| periodic law |
The properties of elements change with increasing atomic number in a periodic way. That's why you can stick the elements into a big chart and have the elements line up in nice families.
출처: misterguch.brinkster.net/vocabulary.html
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| periodic |
a publication composed of issues that appear at regular intervals:
출처: www.teach-nology.com/worksheets/language_arts/voca...
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