| alkaloid | (noun) natural bases containing nitrogen found in plants | - |
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| amphidiploid | (noun) (genetics) an organism or cell having a diploid set of chromosomes from each parent | - |
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| amygdaloid | (noun) volcanic rock in which rounded cavities formed by expanding gas have subsequently become filled with mineral deposits | - |
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| amyloid | (noun) (pathology) a waxy translucent complex protein resembling starch that results from degeneration of tissue | - |
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| (noun) a non-nitrogenous food substance consisting chiefly of starch; any substance resembling starch | - |
| celluloid | (noun) a medium that disseminates moving pictures | Synonyms: cinema, film |
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| (noun) highly flammable substance made from cellulose nitrate and camphor; used in e.g. motion-picture and X-ray film; its use has decreased with the development of nonflammable thermoplastics | - |
| cheloid | (noun) raised pinkish scar tissue at the site of an injury; results from excessive tissue repair | Synonyms: keloid |
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| colloid | (noun) a mixture with properties between those of a solution and fine suspension | - |
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| cycloid | (noun) a line generated by a point on a circle rolling along a straight line | - |
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| diploid | (noun) (genetics) an organism or cell having the normal amount of DNA per cell; i.e., two sets of chromosomes or twice the haploid number | - |
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| epicycloid | (noun) a line generated by a point on a circle rolling around another circle | - |
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| haploid | (noun) (genetics) an organism or cell having only one complete set of chromosomes | - |
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| heteroploid | (noun) (genetics) an organism or cell having a chromosome number that is not an even multiple of the haploid chromosome number for that species | - |
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| hyaloid | (noun) the transparent membrane enveloping the vitreous humor of the eye and separating it from the retina | Synonyms: hyaloid membrane |
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| hydrocolloid | (noun) a substance that forms a gel with water | - |
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| hyperboloid | (noun) a quadric surface generated by rotating a hyperbola around its main axis | - |
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| hypocycloid | (noun) a line generated by a point on a circle that rolls around inside another circle | - |
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| keloid | (noun) raised pinkish scar tissue at the site of an injury; results from excessive tissue repair | Synonyms: cheloid |
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| meloid | (noun) beetle that produces a secretion that blisters the skin | Synonyms: blister beetle |
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| mongoloid | (noun) a person suffering from Down syndrome (no longer used technically in this sense, now considered offensive) | - |
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| paraboloid | (noun) a surface having parabolic sections parallel to a single coordinate axis and elliptic sections perpendicular to that axis | - |
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| polyploid | (noun) (genetics) an organism or cell having more than twice the haploid number of chromosomes | - |
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| tabloid | (noun) newspaper with half-size pages | Synonyms: rag, sheet |
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| (noun) sensationalist journalism | Synonyms: tab, yellow journalism |