Science / Biology / Jurassic Period: Middle period of the Mesozoic Era, between 185-135 million years ago. Characterized by the (possible) origin of angiosperms and the continued split of the worldwide supercontinent of Pangaea.
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Period Noun Synonyms: interval, time, term, span, duration, spell, space, stretch, while, patch
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Science / Biology / Cretaceous Period: The geologic period between the Jurassic Period (140 milliojn years ago) and the Tertiary Period (beginning 65 million years ago). The Cretaceous was marked by a mass extinction that closed the period MORE
Health / Dentistry / Periodontal: Relating to the tissue and bone that supports the tooth (from peri, meaning 'around,' and odont, 'tooth'). MORE
Health / Fitness / Periodization: A method of organizing a strength training workout program into several periods, each lasting about four weeks. Each phase has a different emphasis. MORE
Health / Dentistry / Periodontal Disease: The inflammation and infection of gums, ligaments, bone, and other tissues surrounding the teeth. Gingivitis and periodontitis are the two main forms of periodontal disease. Also called gum disease or MORE
Business / Finance / Periodicity: The level of detail in terms of time at which data is forecast or reported, specified as months, quarters, or years. MORE
Health / Dentistry / Periodontal Pocket: An abnormal deepening of the gingival crevice. It is caused when disease and infection destroy the ligament that attaches the gum to the tooth and the underlying bone. MORE