n, pl  -sei   :  any of various small muscles arising from the metacarpals and metatarsals and inserted into the bases of the first phalanges  a  :  DORSAL INTEROSSEUS  b  :  PALMAR INTEROSSEUS  c  :  PLANTAR INTEROSSEUS .
 
 
 
Similar sounding terms:  in·ter·os·se·ous  in·tra·os·se·ous 
 
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