| chaenactis | (noun) any of several United States plants having long stalks of funnel-shaped white or yellow flowers | - |
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| chaeta | (noun) a stiff chitinous seta or bristle especially of an annelid worm | - |
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| chaetal | (adjective) of or relating to chaetae (setae or bristles) | - |
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| chaetodon | (noun) any fish of the genus Chaetodon | - |
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| chaetognath | (noun) any worm of the Chaetognatha; transparent marine worm with horizontal lateral and caudal fins and a row of movable curved spines at each side of the mouth | Synonyms: arrowworm |
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| chaetognathan | (adjective) of or relating to arrowworms | Synonyms: chaetognathous |
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| chaetognathous | (adjective) of or relating to arrowworms | Synonyms: chaetognathan |
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