Crossword Clue:

the process of measuring

AnswerCrossword Clue
PALATOMETERInstrument for measuring movements of the velum.
MACHNumber used in measuring the speed of sound
EURYONPoint for measuring the skull.
ISOMETRICMeasuring the same, as crystal sides.
INCHWORMSong character known for "measuring the marigolds"
OPALStone measuring 5.5 to 6.5 on the Mohs scale