milligram-hour

[ mil-i-gram-ouuh r, -ou-er ]
/ ˈmɪl ɪˌgræmˌaʊər, -ˌaʊ ər /

noun Radiotherapy.

a unit of measure for a dose of radium expressed as the amount of radiation received by exposure to one milligram of radium for one hour.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019