astragal-
combining form 
or astragalo-
Etymology: Greek, from astragalos 
1. : dice 
< astragalomancy >
2.[New Latin astragalus, from Greek astragalos]  
a. : the bone astragalus 
< astragalectomy >
b. : astragalar and 
< astragalocalcaneal >
or astragalo-
1.
< astragalomancy >
2.
a.
< astragalectomy >
b.
< astragalocalcaneal >