chert | (noun) variety of silica containing microcrystalline quartz | - |
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cherty | (adjective) resembling or containing chert | - |
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feathertop | (noun) northeastern tropical African plant having feathery panicles | Synonyms: feathertop grass, Pennistum villosum |
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(noun) a variety of reed grass | Synonyms: Calamagrostis acutiflora, feather reed grass |
gigahertz | (noun) 1,000,000,000 periods per second | Synonyms: Gc, GHz, gigacycle, gigacycle per second |
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hertz | (noun) the unit of frequency; one hertz has a periodic interval of one second (named for Heinrich Rudolph Hertz) | Synonyms: cps, cycle, cycle per second, cycles/second, Hz |
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hitherto | (adverb) used in negative statement to describe a situation that has existed up to this point or up to the present time | Synonyms: as yet, heretofore, so far, thus far, til now, until now, up to now, yet |
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kilohertz | (noun) one thousand periods per second | Synonyms: kc, kHz, kilocycle, kilocycle per second |
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megahertz | (noun) one million periods per second | Synonyms: Mc, megacycle, megacycle per second, MHz |
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terahertz | (noun) one trillion periods per second | Synonyms: THz |
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