In front and below.
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an·tero·in·fe·ri·or .ant-ə-(.)rō-in-'fir-ē-ər adj located in front and below <the patella is at the \anteroinferior aspect of the femur (L. L. Langley)>
an·tero·in·fe·ri·or·ly adv
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an·tero·in·fe·ri·or (an″tər-o-in-fērґe-ər) situated anteriorly and inferiorly.Medical dictionary. 2011.