You searched for: “capillaroscopies”
capillaroscopy (s) (noun), capillaroscopies (pl)
The diagnostic examination of capillaries with a microscope; especially, of the finger and toe nail beds: Capillaroscopy was explained by Dr. Smart as the scrutiny of the cutaneous capillaries at the base of the fingernails and toenails through the low power of the microscope.