os
os1[ɒs](pl. ossa ˈɒsə)- (Anatomy)a bone (used chiefly in Latin names of individual bones, e.g. os trapezium)
(剖)骨(主要用于骨的拉丁名,如os trapezium)
语源- Latin
os2[ɒs](pl. ora ˈɔːrə)- (Anatomy)an opening or entrance to a passage, especially one at either end of the cervix of the womb
(剖)(尤指子宫颈的两头之一)
语源- mid 18th cent.: from Latin os 'mouth'
考试词汇表