re·duc·ti·o ad ab·sur·dum  (rĭ-dŭk'tē-ō ād əb-sûr'dəm, -zûr'-, -shē-ō)  n. pl. re·duc·ti·o·nes ad absurdum (-ō'nēz, -nās) Disproof of a proposition by showing that it leads to absurd or untenable conclusions. [Medieval Latin reductiō ad absurdum : Latin reductiō, a bringing back, reduction + Latin ad, to + Latin absurdum, absurdity, from neuter of absurdus, absurd.] |