Webster's English Dictionary

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perissodactyl

pe.ris.so.dac.tyl \p*-.ris-*-'dak-t*l\ \-t*-l*s\ aj [deriv. of MGk 
   perissodaktylos having more than the usual number of finge]rs or toes, fr. 
   Gk perissos more than normal (fr. peri in excess) + daktylos toe, finger - 
   more at PERI- 1: having the toes in odd numbers or unevenly disposed in 
   relation to the  axis of the foot 2: of or relating to an order 
   (Perissodactyla) of perissodactyl ungulate m ammals - perissodactyl n