【机】 bow pen; bow spacer
circularity; cirlce; justify; round; roundness【化】 circle【医】 gyro-
for a while; little; minor; petty; small; young【计】 mic-【医】 micr-; micro-; mikro-; nano-
advise; compasses; dividers; gauge; plan; rule【医】 gage; gauge
pen