| anorectal | (adjective) pertaining to the anus and rectum considered together | - |
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| colorectal | (adjective) relating to or affecting the colon and the rectum | - |
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| dialectal | (adjective) belonging to or characteristic of a dialect | - |
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| fractal | (noun) (mathematics) a geometric pattern that is repeated at every scale and so cannot be represented by classical geometry | - |
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| ictal | (adjective) of or relating to a seizure or convulsion | Synonyms: ictic |
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| lactalbumin | (noun) albumin occurring in milk | - |
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| nyctalopia | (noun) inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder | Synonyms: moon blindness, night blindness |
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| octal | (adjective) of or pertaining to a number system having 8 as its base | - |
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| postictal | (adjective) pertaining to the period following a seizure or convulsion | - |
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| proctalgia | (noun) pain in the rectum | - |
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| rectal | (adjective) of or involving the rectum | - |
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