'Radiometry' definitions:

Definition of 'Radiometry'

From: GCIDE

Radiometry \Ra`di*om"e*try\ (r[=a]`d[i^]*[o^]m"[-e]*tr[y^]), n. (Physics) The use of the radiometer, or the measurement of radiation. -- {Ra`di*o*met"ric} (r[=a]`d[i^]*[-o]*m[e^]t"r[i^]k), a. [Webster 1913 Suppl.]